1
Rudolf Maarten Bolle, Sharon Louise Nunes, Sharathchandra Pankanti, Nalini Kanta Ratha, Barton Allen Smith, Thomas Guthrie Zimmerman: Method for biometric-based authentication in wireless communication for access control. International Business Machines Corporation, Randy W Lacasse, Ramraj Soundararajan, Lacasse & Associates, November 16, 2004: US06819219 (341 worldwide citation)

Smart cards systems that are utilized in biometric authentication are slow in processing and have the cards themselves have the added disadvantage of being misplaced or lost. Moreover, storing biometric data (on a database) over a network poses security issues that in extreme instances can be compro ...


2
Thomas Guthrie Zimmerman: System and method for performing inventory using a mobile inventory robot. International Business Machines Corporation, Samuel Kassatly, Shimokaji & Associates P C, April 6, 2010: US07693757 (130 worldwide citation)

A mobile inventory robot system generates an inventory map of a store and a product database when a mobile inventory robot is manually navigated through the store to identify items on shelves, a location for each of the items on the shelves, and a barcode for each of the items. The system performs i ...


3
Barton Allen Smith, Thomas Guthrie Zimmerman: Digital pen using interferometry for relative and absolute pen position. International Business Machines Corporation, John L Rogitz, July 15, 2003: US06592039 (59 worldwide citation)

A digital pen that has an ink writing tip includes a laser on a pen body that directs light toward paper across which the writing tip is stroked. A diffraction grating reflects a reference beam and passes a scattered beam from the substrate toward translation detectors, which consequently receive in ...


4
Ronald Fagin, Nimrod Megiddo, Robert John Tasman Morris, Hal Jervis Rosen, Sridhar Rajagopalan, Thomas Guthrie Zimmerman: Digital pen using speckle tracking. International Business Machines Corporation, John L Rogitz, February 3, 2004: US06686579 (50 worldwide citation)

A digital pen that has an ink writing tip includes a laser on a pen body that directs light toward paper across which the writing tip is stroked. A CMOS camera or CCD is also mounted on the pen body for detecting reflections of the laser light, referred to as “speckles”. A processor in the pen body ...


5
Thomas Guthrie Zimmerman: Digital pen using visible image and autocorrelation of substrate pattern. International Business Machines Corporation, John L Rogitz, November 18, 2003: US06650320 (47 worldwide citation)

A digital pen that has an ink writing tip includes a light source on a pen body that directs light toward paper across which the writing tip is stroked. A CMOS camera or CCD is also mounted on the pen body for detecting reflections of the light. A processor in the pen body determines relative pen mo ...


6
Gregory Fraser Russell, Barton Allen Smith, Thomas Guthrie Zimmerman: Digital pen using ultrasonic tracking. International Business Machines Corporation, John L Rogitz, March 9, 2004: US06703570 (45 worldwide citation)

A digital pen that has a writing tip includes an ultrasonic (US) transducer on a pen body that generates frames of US pulses toward a receiver base in response to an infrared (IR) synchronizing signal from the base. The first pulse of a frame is adjusted by a modulo of the US period &tgr; when the t ...


7
Thomas Guthrie Zimmerman, Richard Clement Allen, David Jun Lu, Florian Vogt: System and method for optimizing personal area network (PAN) electrostatic communication. International Business Machines Corporation, John L Rogitz, April 1, 2003: US06542717 (37 worldwide citation)

Systems and methods for optimizing performance of personal area network (PAN) systems that use electric fields as communication media between PAN transmitters carried by people and PAN receivers mounted on computers to which selective access is sought to be established. Multiple PAN receiver antenna ...


8
Viktors Berstis, Thomas Guthrie Zimmerman: Trackpoint device. International Business Machines Corporation, Jeffrey S LaBaw, September 5, 2000: US06115030 (33 worldwide citation)

A capacitive sensor input device which includes a movable stud having a top portion for manipulation by a user and a conductive bottom portion is connected to a planar surface, such as a circuit board by means of an elastomeric, adhesive connector. A plurality of sensors are disposed on the planar s ...


9
David Jun Lu, Thomas Guthrie Zimmerman: Wireless identification and tracking using magnetic fields. International Business Machines Corporation, Gates & Cooper, February 3, 2004: US06686881 (33 worldwide citation)

A method, apparatus, article of manufacture, and a memory structure for tracking assets. The method comprises the steps of generating a magnetic field at the base station, receiving a radio signal transmitted from the remote station disposed at a location, and determining a distance from the base st ...


10
Frank Hoffman, Thomas Guthrie Zimmerman: Pen input device using electrostatic coupling. International Business Machines Corporation, John L Rogitz, August 28, 2001: US06281888 (31 worldwide citation)

A pen input device includes an array of receiver electrodes and a transmitter juxtaposed with the array for coupling electric signals from the transmitter to a person's hand. A person can use an ordinary writing instrument to write on a paper or other substrate that rests on the array, and the ...