1
Roy L Adler, Bruce P Kitchens, Charles P Tresser, Chai W Wu: Compressed image authentication and verification. International Business Machines Corporation, Stephen C Kaufman, McGuireWoods, August 14, 2001: US06275599 (170 worldwide citation)

A watermarking method involves mostly invisible artifacts and is sensitive to any modification of the picture at the level of precision rendered by the compressed version of the image. The image is compressed according to a known compression standard, such as the JPEG standard, and with a fixed qual ...


2
Timothy J Chainer, Claude A Greengard, Charles P Tresser, Chai W Wu: Event-recorder for transmitting and storing electronic signature data. International Business Machines Corporation, Stephen C Kaufman, Whitham Curtis & Christofferson P C, February 25, 2003: US06525672 (145 worldwide citation)

An electronic event recorder for attachment to a vehicle is provided which can broadcast encrypted signature and data, thereby leaving behind an electronic version of a “fingerprint” in the event of an accident or traffic violation. The fingerprint, captured by an external data acquisition system or ...


3
Arnold Halperin, Paul Andrew Moskowitz, Alejandro Gabriel Schrott, Charles P Tresser, Robert Jacob von Gutfeld: Method and system for preventing counterfeiting of high price wholesale and retail items. International Business Machines Corporation, Stephen C Kaufman Esq, McGinn & Gibb P C, May 1, 2001: US06226619 (140 worldwide citation)

A method and system for preventing counterfeiting of an item, include an interrogatable tag attached to the item. The item includes visible indicia for comparison with secret, non-duplicable information stored in the tag designating authenticity.


4
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 ...


5
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 ...


6
Timothy J Chainer, Claude A Greengard, William R Pulleyblank, Charles P Tresser, Chai W Wu: Method and apparatus for securely determining aspects of the history of a good. International Business Machines Corporation, Stephen C Kaufman, Whitham Curtis & Christofferson P C, December 31, 2002: US06501390 (82 worldwide citation)

The present invention provides methods and apparatus to detect and reliably record the physical history of a product including effects due to one or more of the following: 1) product use 2) handling 3) tampering and 4) environment of the product (as changes in the environment, such as excessive temp ...


7
Marco Martens, Charles P Tresser, Robert J von Gutfeld, Chai W Wu: Method and apparatus for depositing ordinary checks from home or office. International Business Machines Corporation, Stephen C Kaufman, Whitham Curtis & Christofferson P C, September 17, 2002: US06450403 (77 worldwide citation)

An apparatus and method allow to deposit ordinary checks from home or office. A special scanner is used to scan an endorsed check for deposit. The check may have printed thereon encryptions in at least selected locations. Scanning the endorsed check with the scanner to generates a digitized version ...


8
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 ...


9
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 ...


10
Gaurav Aggarwal, Pradeep K Dubey, Ashutosh Kulshreshtha, Marco Martens, Charles P Tresser, Chai W Wu: Semi-fragile watermarks. International Business Machines Corporation, T Rao Coca, Whitham Curtis & Christofferson P C, December 21, 2004: US06834344 (62 worldwide citation)

A method is presented for marking high-quality digital images with a robust and invisible watermark. It requires the mark to survive and remain detectable and authenticatable through all image manipulations that in themselves do not damage the image beyond useability. These manipulations include JPE ...