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Don Coppersmith, Claude A Greengard, Charles P Tresser, Chai Wah Wu: System for protection of goods against counterfeiting. International Business Machines Corporation, Stephen C Kaufman Esq, Whitham Curtis & Whitham, May 30, 2000: US06069955 (92 worldwide citation)

A visible seal or label containing a serial number is placed in plain view on the product packaging. The visible label contains the serial number as well as a first public key encrypted version of the serial number. A second or hidden label inside of the package has thereon a second a second encrypt ...


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Timothy Joseph Chainer, Claude A Greengard, Paul Andrew Moskowitz, Alejandro Gabriel Schrott, Charles P Tresser, Robert Jacob von Gutfeld, Chai Wah Wu: Method and system for authenticating objects and object data. International Business Machines Corporation, Stephen C Kaufman Esq, McGinn & Gibb PLLC, May 28, 2002: US06397334 (90 worldwide citation)

A system and method for authenticating an image of an object, include at least one identifier associated with the object, a receiver for interrogating the at least one identifier to produce identification information, a camera system for recording an image from the object including the at least one ...


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Paul F Greier, Kenneth C Ho, Richard Ian Kaufman, Steven Edward Millman, Gerhard R Thompson, Steven L Wright, Chai Wah Wu: Method and apparatus for adjusting subpixel intensity values based upon luminance characteristics of the subpixels for improved viewing angle characteristics of liquid crystal displays. International Business Machines Corporation, Robert M Trepp, October 5, 2004: US06801220 (82 worldwide citation)

Viewing angle characteristics of a liquid crystal display (LCD) are improved by reducing the number of subpixels in an image with mid-tone luminance values. In a preferred embodiment, a first table of entries associating subpixel intensity values and subpixel luminance values for a LCD in at least o ...


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Arnold Halperin, Joseph D Rutledge, Alejandro Gabriel Schrott, Charles P Tresser, Robert Jacob von Gutfeld, Chai Wah Wu: Hand held telephone set with separable keyboard. International Business Machines Corporation, Stephen C Kaufman Esq, Whitham Curtis & Whitham, September 5, 2000: US06115616 (70 worldwide citation)

A detachable keyboard for a telephone set is provided in the form of a keyboard card clipped to the headset, which is completely detached from the body when unclipped. Wireless communication between the handset body and keyboard is used when the card is unclipped, while contacts are activated in the ...


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Don Coppersmith, Claude A Greengard, Charles P Tresser, Chai Wah Wu: System for protection of goods against counterfeiting. International Business Machines Corporation, Whitham Curtis & Christofferson P C, Stephen C Kaufman, February 7, 2006: US06996543 (65 worldwide citation)

In order to verify the authenticity of manufactured goods, a smart tag is attached to the goods containing encrypted authentication information, such as a serial number, a description of the good's physical appearance or chemical decomposition, its color, or digital images of the good etc. The encry ...


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Gordon W Braudaway, Frank P Giordano, Marco Martens, Charles P Tresser, Chai Wah Wu, Charles A Micchelli: Method and apparatus to correct distortion of document copies. International Business Machines Corporation, Whitham Curtis & Christofferson P C, Stephen C Kaufman, October 11, 2005: US06954290 (38 worldwide citation)

Pages of books are copied without distortion due to curvature of the page near the book binding or the distortion in a copied page is corrected using the spacing of equidistant bars on tape strips applied to the top and bottom edges of a page before copying. The tape is preferably transparent and ra ...


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Michael Shub, Charles Philippe Tresser, Chai Wah Wu: Method and apparatus for remote commerce with customer anonymity. International Business Machines Corporation, Stephen C Kaufman, Whitham Curtis & Christofferson P C, October 19, 2004: US06807530 (35 worldwide citation)

A method and apparatus which enables customers to remotely order goods from a merchant and receive the goods without revealing customer identity or address to the merchant, nor revealing what is bought to the bank or payment agency, and more generally to preserve as much anonymity as required such t ...


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Don Coppersmith, Frederick Cole Mintzer, Charles P Tresser, Chai Wah Wu, Minerva Ming Yee Yeung: Secured signal modification and verification with privacy control. International Business Machines Corporation, Stephen C Kaufman, McGuireWoods, July 3, 2001: US06256736 (32 worldwide citation)

A watermarking scheme which allows the watermarked image to be authenticated by an authentication agent without revealing the human-readable content of the image. There is disclosed an approach which combines privacy control with watermarking and authentication mechanisms. The watermark can be made ...


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Roy Lee Adler, Alan David Kalvin, Joseph Y Margulies, Charles P Tresser, Chai Wah Wu: System and method for three-dimensional geometric modeling by extracting and merging two-dimensional contours from CT slice data and CT scout data. International Business Machines Corporation, Louis J Percello, Whitham Curtis & Whitham, February 22, 2000: US06028907 (31 worldwide citation)

A computer system and method solve the problem of getting a useful three-dimensional representation of an object like the spine using a small amount of data. This is done by gathering three-dimensional data in the form of a set of 2D computer tomography (CT) slices of a patient's bones and a coaxial ...


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