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US Fed News Service, Including US State News articles from Wednesday, April 4

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<a href="http://www.highbeam.com/US+Fed+News+Service,+Including+US+State+News/publications.aspx?date=20070404" title="Articles and back issues from US Fed News Service, Including US State News">US Fed News Service, Including US State News articles</a>

US Fed News Service, Including US State News back issues from Wednesday, April 4:

Connecticut, Kentucky Inventors Develop Transactions Processing Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Robert E. Patricelli of Simsbury, Conn., Matthew J. Dallahan of Vernon, Conn., and Kent F. Rausch of LaGrange, Ky., have developed systems and methods for processing transactions involving accounts for reimbursing medical expenses or patient responsible ...

South Korean Inventor Develops Clothe Drying Apparatus

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Bong Hyun Wang of Suwon-Si, South Korea, has developed clothes drying apparatus. According to the U.S. Patent & Trademark Office: "A clothes drying apparatus in which lifters arranged on an inner peripheral surface of a rotating drum, while extending ...

Swedish Inventors Develop Data Decoding Device

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Andreas Olsson and Mats Petter Pettersson, both of Lund, Sweden, have developed a method for decoding data stored in a partial area of a coding pattern on a surface that is based on a recorded image of the partial area. According to the U.S. Patent & ...

New York Inventor Develops Optical Code Reading Device

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Mehul Patel of Fort Salonga, N.Y., has developed an optical code reading device with more than one imaging engine. According to the U.S. Patent & Trademark Office: "A mobile computing device is provided having more than one imaging engine, and preferably, ...

Texas Inventor Develops Real-Time Data Authentication Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- David Scott Hayes of Celina, Texas, has developed a method for authenticating transmitted data in real time. According to the U.S. Patent & Trademark Office: "A digital signature is applied to digital data in real-time. The digital signature serves as a ...

South Korean Inventors Develop Liquid Crystal Display Stand

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Sang-hyun Han and Sang-hak Kim, both of Suwon, South Korea, and You-Sub Lee of Kunpo, South Korea, have developed a stand for large-sized displays such as a liquid crystal display or a plasma dsplay panel, etc. According to the U.S. Patent & Trademark ...

South Korean Inventors Develop Non-Contact Scanning Apparatus

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Sung Q Lee, Ki Bong Song, Kang Ho Park, Eun Kyoung Kim and Woo Sub Youm, all from Daejon, South Korea, Jun Ho Kim of Gyeongsangnam-do, South Korea, and Kyi Hwan Park of Gwangju, South Korea, have developed a non-contact scanning apparatus using frequency response ...

U.S., British Inventors Develop Computer Platform Security Monitoring Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Graeme John Proudler of Stoke, Great Britain, Boris Balacheff of Keynsham, Great Britain, Siani Lynne Pearson of Westbury-on-Trym, Great Britain, and David Chan of Monte Sereno, Calif., have developed a method of data event logging in computing ...

South Korean Inventor Develops Laser Scanning Unit

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Jae-hwan Yoo of Yongin, South Korea, has developed a laser scanning unit to form an electrostatic latent image according to an image signal by projecting a light onto a photosensitive medium. According to the U.S. Patent & Trademark Office: "The laser ...

Maryland Inventor Develops Mail Decontamination Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Oscar Lee Avant of Silver Springs, Md., has developed methods for depositing and retrieving mail into and from a mailing receptacle. According to the U.S. Patent & Trademark Office: "A decontamination bag is positioned in the interior space of a public mailbox ....

Australian Inventor Develops Digital Data Compression Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- James Philip Andrew of Waverton, Australia, has developed a digital image compression method using spatial magnitude context entropy coding of discrete wavelet transform coefficients. According to the U.S. Patent & Trademark Office: "A method of ...

Australian Inventor Develops Electronic Document Manipulation Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Stephen Leslie Tyler of West Pennant Hills, Australia, has developed a method for manipulating an electronic document automatically created by an application program. According to the U.S. Patent & Trademark Office: "The method comprises the step of ...

California Inventors Develop Object's Placement Position Detection Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Carlo Tomasi of Palo Alto, Calif., and Salih Burak Gokturk of Mountain View, Calif., have developed a method and an apparatus for approximating depth of an object's placement onto a monitored region with applications to virtual interface devices. According to ...

New Hampshire Inventor Develops Wireless Station Protocol Apparatus

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Floyd Backes of Sharon, N.H., has developed an apparatus of wireless network configuration and power level adjustment for network performance optimization. According to the U.S. Patent & Trademark Office: "The performance and ease of management of wireless ...

California Inventor Develops Network Attached Storage Pool Load Balancing Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Robert M. English of Menlo Park, Calif., has developed a method of load balancing of file servers. According to the U.S. Patent & Trademark Office: "A system and method for lazy-copy sub-volume load balancing a networked attached storage pool is provided ....

California Inventors Develop Remote Method Invocation Server configuration Hierarchy Architecture

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Kehsing J. Chou, Mei-Ing W. Huang, Robert Nelson Summers and Mimi Phuong-Thao Vo, all from San Jose, Calif., Taejae Lee of Cupertino, Calif., and Basuki N. Soetarman of Los Gatos, Calif., have developed an architecture and an implementation of a dynamic remote method ...

German Inventor Develops Digital Recording Rendering Authorization Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Andre Weimerskirch of Eppstein, Germany, has developed a method for authorizing the rendering of a digital recording. According to the U.S. Patent & Trademark Office: "A first section and a last section of a track is first identified. A watermark is then ...

Austrian, Swiss, Belgian Inventors Develop Color Analyzing Apparatus

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Harald Kerschbaumer of Klaus, Austria, Walter Pokorny of Thuringen, Austria, Gottfried Rohner of Altstatten, Switzerland, and Graham Pye of Genk, Belgium, have developed a color analyzing apparatus with polarized light source. According to the U.S. Patent ...

Illinois, Colorado Inventors Develop Evaporative Light Detection System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- James M. Anderson Jr. and Bart C. Benedict, both of Arlington Hts, Ill., Raaidah Saari-Nordhaus of Lindenhurst, Ill., Melissa Wilcox of Libertyville, Ill., Ronald Krob of Chicago, and Arnold Williams of Boulder, Colo., have developed a low temperature adaptor for ...

Ohio, California Inventors Develop Network Partitioning Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- David E. Halasz of Stow, Ohio, Victor J. Griswold of North Canton, Ohio, Robert C. Meier of Cuyahoga Falls, Ohio, Richard D. Rebo of Dayton, Ohio, and Merwyn B. Andrade of San Jose, Calif., have developed a method for servicing a virtual local area network ...

Finnish Inventor Develops Hardware Design

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Aki Happonen of Kiiminki, Finland, has developed a reconfigurable apparatus being configurable to operate in a logarithmic scale. According to the U.S. Patent & Trademark Office: "An integrated circuit has a command/control bus and a number of processing ...

California Inventors Develop Data Securing Technique

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Khanh V. Nguyen of Milpitas, Calif., and Thomas W. Richter of Sunnyvale, Calif., have developed a method and an apparatus for encrypting data communicated between a client and a server that use an unencrypted data transfer protocol. According to the U.S ....

Japanese Inventors Develop Driving Aiding System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Ryosuke Iida and Yuichi Hirama, both of Yokohama, Japan, Michio Miwa of Urayasu, Japan, Kazufumi Mizusawa of Kawasaki, Japan, Shusaku Okamoto of Hirakata, Japan, and Takashi Yoshida of Ikoma, Japan, have developed a driving aiding system for aiding the drive by ...

Texas Inventors Develop Information Handling System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Joshua N. Alperin of Round Rock, Texas, and Benjamen G. Tyner of Austin, Texas, have developed a method and a system for validating physical access to an information handling system. According to the U.S. Patent & Trademark Office: "An information handling ...

German Inventors Develop Injection Molding Machine

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Sasan Habibi-Naini of Aachen, Germany, Oliver Pfannschmidt of Bad Oeynhausen, Germany, and Christian Schlummer of Freiburg, Germany, have developed an injection molding machine and an injection molding method for manufacturing foamed shaped parts. According to ...

Florida Inventor Develops Smart Card Reader

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Christopher Stewart of Tamarac, Fla., has developed a card reader for usage with a smart card to reduce card abrasion. According to the U.S. Patent & Trademark Office: "The present invention relates to a smart card reader that enables a user to insert a ...

Italian Inventors Develop Optical Reading Apparatus

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Claudio Mazzone of Crespellano, Italy, Lorenzo Girotti of Bologna, Italy, and Marco Mallegni of Galliera, Italy, have developed an automatic optical reading apparatus with a light emitting section, a light receiving section and an outside interface ...

Idaho Inventor Develops Data Compression Activities Managing Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Todd C. Adelmann of Boise, Idaho, has developed a method and a related system for managing data compression activities within a removable storage device that is receivable by a host device. According to the U.S. Patent & Trademark Office: "An exemplary ...

New York Inventors Develop Biological Spore Collection Apparatus

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Carl Czajkowski of South Jamesport, N.Y., and Barbara Panessa Warren of Port Jefferson, N.Y., have developed a portable apparatus for the collection and elimination of spores. According to the U.S. Patent & Trademark Office: "The present invention is for a ...

Massachusetts Inventors Develop Arbitrary Problem Evaluation Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Linda S. Higgins and James R. Heidenreich, both of Marblehead, Mass., have developed systems and methods of facilitating and evaluating user thinking about an arbitrary problem. According to the U.S. Patent & Trademark Office: "The system includes first ...

Taiwanese Inventor Develops Boot Swap Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Chun-Liang Lee of Taipei, Taiwan, has developed a boot swap method for multiple processor computer systems. According to the U.S. Patent & Trademark Office: "A boot swap method for multiple processor computer systems utilizes a baseboard management ...

New York, Massachusetts Inventors Develop Ceramic Microstructure Fabrication Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Hong Yang of Rochester, N.Y., Pascal Deschatelets of Troy, N.Y., and George M. Whitesides of Newton, Mass., have developed a method of fabrication of ceramic microstructures. According to the U.S. Patent & Trademark Office: "The invention provides ceramic molded ...

Virginia, North Carolina Inventors Develop Mini Card Reader System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Eric Ison of Virginia Beach, Va., and Robert L. Caillier of Moyock, N.C., have developed a card reader system that includes a sensor to sense the presence of a scoring of a card at a specified card location. According to the U.S. Patent & Trademark Office: ...

Japanese Inventors Develop Center Server Accessing Database System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Kazuhiko Mogi and Hideomi Idei, both of Yokohama, Japan, and Norifumi Nishikawa and Yoshiaki Eguchi, both of Machida, Japan, have developed a database (DB) system that includes a center server and local servers. According to the U.S. Patent & Trademark ...

New York Inventors Develop Local Optical Clock Synchronizing System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Casimer M DeCusatis of Poughkeepsie, N.Y., and Lawrence Jacobowitz of Wappingers Falls, N.Y., have developed a method and a system for synchronizing a local optical clock. According to the U.S. Patent & Trademark Office, the invention relates to a "method ...

Pipes & Wires Services Wins $195,000 Contract

Apr 04, 2007 ... NEW CUMBERLAND, Pa., April 4 -- The U.S. Defense Logistics Agency has awarded a $195,000 contract to Pipes & Wires Services, Westminster, Md., for replacement of underground heat distribution system. The contract was awarded by the agency's Defense Distribution Center, New ...

Durodyne Wins $497,160 Contract

Apr 04, 2007 ... COLUMBUS, Ohio, April 4 -- The Defense Logistics Agency has awarded a contract valued at up to $497,160 to Durodyne Inc., Tucson, Ariz., for pipes, tubing, hoses and fittings. The contract was awarded by the agency's Defense Supply Center, Columbus, Ohio. For more ...

Ira Green Wins $36,091 Contract

Apr 04, 2007 ... PHILADELPHIA, April 4 -- The Defense Logistics Agency has awarded a $36,091 contract to Ira Green Inc., Providence, R.I., for clothing, individual equipment and insignia. The contract was awarded by the agency's Defense Supply Center, Philadelphia. For more ...

Washington Inventors Develop Pre-Boot Data Sharing Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Michael A. Rothman of Olympia, Wash., and Vincent J. Zimmer of Federal Way, Wash., have developed a system and a method for sharing pre-boot data with agents in the operating system (OS) runtime. According to the U.S. Patent & Trademark Office: "The ...

South Korean Inventor Develops Ornamental Design for Washing Machine

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Seung Bin Im of Gwangmyung-si, South Korea, has developed an ornamental design for washing machine, the U.S. Patent & Trademark Office announced. The inventor was issued U.S. Patent No. D539,995 on April 3. The patent has been assigned to Samsung ...

German Inventor Develops Specimen Automatic Transportation Drive System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Stefan Thiem of Heidelberg, Germany, has developed a drive system for an apparatus for staining specimens. According to the U.S. Patent & Trademark Office: "For automatic transportation and lifting and lowering of specimens in an automatic stainer, a drive system ...

New York Inventors Develop Organic Light-Emitting Diode Device

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Joel D. Shore and Michael L. Boroson, both of Rochester, N.Y., and Dustin L. Winters of Webster, N.Y., have developed microcavity organic electroluminescent devices. According to the U.S. Patent & Trademark Office, the invention relates to an "organic ...

Virginia Inventors Develop Wireless Communication Network Measurement Data Collection Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Thomas B. Gravely and John P. Carlson, both of Herndon, Va., Joseph P. Kennedy Jr. of Great Falls, Va., and Andrew Beck of Ashburn, Va., have developed a method of wireless communication network measurement data collection that uses infrastructure overlay-based ...

Belgian Inventors Develop Mill Roll Surface Inspection Process

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Roger Franssen of Montzen-Plombieres, Belgium, Marc Schyns of Roclenge-sur-Geer, Belgium, and Hugo Uijtdebroeks of Hasselt, Belgium, have developed a method for inspecting the surface of a roll cylinder and device therefor. According to the U.S. Patent & ...

Texas Inventor Develops Processor Performance Monitoring Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Alexander Erik Mericas of Austin, Texas, has developed a method, an apparatus and a computer program product for identifying sources of performance events. According to the U.S. Patent & Trademark Office: "Event vectors are included in an instruction ...

Japanese Inventors Develop Information Distribution Service System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Hideyuki Aoki and Norio Murakami, both of Kawasaki, Japan, have developed an information distribution service system based on predicted changes in location of mobile information terminal. According to the U.S. Patent & Trademark Office: "In an information ...

Ohio, California, Georgia Inventors Develop Aerial Inspection System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Michael Shane Belew of Columbus, Ohio, Hossein Eslambolchi of Los Altos Hills, Calif., John Sinclair Huffman of Conyers, Ga., have developed an arial utility inspection method and apparatus. According to the U.S. Patent & Trademark Office: "The Aerial ...

California Inventors Develop Branch Reconfiguration System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Michael S. Schlansker of Los Altos, Calif., Boon Seong Ang of Sunnyvale, Calif., and Philip J. Kuekes of Menlo Park, Calif., have developed a system and a method for executing programs. According to the U.S. Patent & Trademark Office: "The invention ...

South Korean Inventor Develops Ornamental Design for Hair Brush

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Ran Kyu Park of Seoul, South Korea, has developed an ornamental design for a hair brush, the U.S. Patent & Trademark Office announced. The inventor was issued U.S. Patent No. D518,644 on April 11, 2006. The original application was filed on June ...

Japanese Inventors Develop Wide Range Image Pickup Apparatus

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Koichi Yoshikawa and Shigeru Tajima, both of Kanagawa, Japan, have developed an image pickup apparatus which picks up images of an image pickup object. According to the U.S. Patent & Trademark Office: "An image pickup apparatus which can suppress ...

Italian Inventors Develop Surface-Mounted Integrated Current Sensor

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Giuseppe Catona, Riccardo Groppo and Alberto Manzone, all from Orbassano, Italy, have developed a surface-mounted integrated current sensor for use in a printed circuit. According to the U.S. Patent & Trademark Office: "Described herein is a ...

Texas Inventors Develop Chemical Mixtures Monitor System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Phuong-Anh Tang and Gary R. Anderson, both of Austin, Texas, and Mark A. Campbell of Bastrop, Texas, have developed a system and a method for monitoring and/or controlling attributes of multiple chemical mixtures with a single sensor. According to the U.S ....

New York Inventor Develops Software Systems Audition Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Robert Barritz of New York has developed a method and a system for auditing software systems by monitoring the use and non-use of software programs in a computer. According to the U.S. Patent & Trademark Office: "An operating system of the computer ...

California Inventor Develops Novel Communication Protocol

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Jude J. Katsch of Felton, Calif., has developed a communication protocol for serial peripheral devices. According to the U.S. Patent & Trademark Office, the invention relates to a "computing system comprising a host device which includes a serial ...

Japanese Inventors Develop Metallic Plate Member Forging Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Fujio Akahane, Nagamitsu Takashima, Akiharu Kurebayashi, Kazushige Hakeda and Ryoji Uesugi, all from Nagano, Japan, have developed a punch for forging a metallic plate member. According to the U.S. Patent & Trademark Office: "A first die is adapted to be ...

South Korean Inventors Develop Liquid Crystal Display Device

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Yun-Bok Lee of Seoul, South Korea, and Jeong-Hyun Kim of Gunpo-si, South Korea, have developed an array substrate for in-plane switching mode liquid crystal display device and a method of fabricating the same. An abstract of the invention, released by the U.S ....

French Inventors Develop Workpiece Holding Press

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Patrick Aubry of Crouy en Thelle, France, Alain Paul Bourgeois of Rueil Malmaison, France, and Alain Georges Henri Lorieux of Sannois, France, have developed a press for holding and pressing a workpiece. According to the U.S. Patent & Trademark Office: ...

German Inventor Develops Ornamental Design for Toothbrush Head Protective Cover

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Bjorn Kling of Frankfurt am Main, Germany, has developed an ornamental design for a protective cover for a toothbrush head, the U.S. Patent & Trademark Office announced. The inventor was issued U.S. Patent No. D518,643 on April 11, 2006. The patent ...

U.S., French Inventors Develop Web Requisition Catalog Management Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Timothy R. Kane of Endicott, N.Y., Amy J. Snavely of Binghamton, N.Y., Sherry L. Wilson of Conklin, N.Y., and Jean-Paul Chollon of St. Medard d'Eyrans, France, have developed a system and a method for front end business logic and validation. According to the ...

Israeli Inventors Develop Generalized Panoramic Mosaic

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Shmuel Peleg of Mevaseret Zion, Israel, and Benny Rousso of Bat-Yam, Israel, have developed a video image mosaicing for obtaining panoramic mosaics of a scene. According to the U.S. Patent & Trademark Office: "Video mosaicing is commonly used to increase ...

California Inventors Develop Semiconductor Fabrication Processes Monitoring System

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Mehrdad Nikoonahad, Dan Wack and John Fielden, all from Los Altos, Calif., Ady Levy of Sunnyvale, Calif., Kyle A. Brown of Irvine, Calif., and Gary Bultman of Menlo Park, Calif., have developed methods and systems for monitoring semiconductor fabrication ...

Minnesota, Michigan Inventors Develop Extracorporeal Blood Circuit

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Walter L. Carpenter of Minneapolis, Robert W. Olsen of Plymouth, Minn., Stefanie Heine of Eden Prairie, Minn., Laura A. Yonce of Fridley, Minn., and Frederick A. Shorey Jr. of Grand Rapids, Mich., have developed extracorporeal blood circuits, systems, and methods of ...

Japanese Inventors Develop Information Access Method

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Hironobu Takagi of Tokyo-to, Japan, and Chieko Asakawa of Kawasaki, Japan, have developed a system and a method for information access. According to the U.S. Patent & Trademark Office, the invention aims to "convert the structure of a web page into ...

U.S., South Korean Inventors Develop Distributed Cellular Base Stations Capacity Enhancement Scheme

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- Yong Hoon Kang, Jin Hwa Ku and Seung Hee Lee, all from Seoul, South Korea, Sae-Young Chung of Tewksbury, Mass., M. Vedat Eyuboglu of Concord, Mass., Dae-Young Kim of Lexington, Mass., and Michael D. Pollman of Londonderry, N.H., have developed capacity enhancement ...

New York, Vermont Inventors Develop Common-Path, Point-Diffraction, Phase-Shifting Interferometer

Apr 04, 2007 ... ALEXANDRIA, Va., April 4 -- William Jude Cottrell of Rochester, N.Y., and =Thomas George Ference of Essex Junction, Vt., have developed a common-path, point-diffraction, phase-shifting interferometer that uses a half wave plate having a diffractive element, such as pin hole. According ...