1
William O Dussell, James M Janky, John F Schipper, David J Cowl: Position based personal digital assistant. Trimble Navigation, Blakely Sokoloff Taylor & Zafman, August 17, 1999: US05938721 (722 worldwide citation)

A task description is stored in a database accessible by a mobile computer system. The mobile computer system receives positioning information corresponding to its geographic location and indexes the database based on the positioning information when the information indicates that the mobile compute ...


2
James M Janky, John F Schipper: Location of emergency service workers. Trimble Navigation, John Schipper, September 3, 1996: US05552772 (343 worldwide citation)

Method and apparatus for monitoring the present location of an emergency or general serviceperson, such as a firefighter or a hazardous materials spill clean-up specialist, assigned to perform emergency services at a designated site. The site diameter can be as small as a few meters or as large as s ...


3
John F Schipper, James M Janky: Arrestee monitoring with variable site boundaries. Trimble Navigation, John Schipper, October 22, 1996: US05568119 (324 worldwide citation)

Method and apparatus for monitoring present location of a site arrestee confined to a permitted site of arbitrary size. Present location of the arrestee can be checked at selected time intervals of several hundred milliseconds to thousands of seconds, as desired. The arrestee wears a location-determ ...


4
James M Janky, Eric A Klein, John F Schipper: Vehicle route and schedule exception reporting system. Trimble Navigation, George M Steres, May 12, 1998: US05751245 (277 worldwide citation)

A route exception reporting apparatus is mounted in a mobile shipping vehicle having a predetermined geographic route. The shipping vehicle may be a self-propelled vehicle containing cargo or may also be a separable self-contained shipping container carried on a transportation vehicle. At least a po ...


5
William O Dussell, James M Janky, John F Schipper, David J Cowl: Position based personal digital assistant. Trimble Navigation, Blakely Sokoloff Taylor & Zafman, June 25, 2002: US06411899 (269 worldwide citation)

A task description is stored in a database accessible by a mobile computer system. The mobile computer system receives positioning information corresponding to its geographic location and indexes the database based on the positioning information when the information indicates that the mobile compute ...


6
William O Dussell, James M Janky, John F Schipper, David J Cowl: Position based personal digital assistant. Trimble Navigation, Blakely Sokoloff Taylor & Zafman, July 24, 2001: US06266612 (256 worldwide citation)

A task description is stored in a database accessible by a mobile computer system. The mobile computer system receives positioning information corresponding to its geographic location and indexes the database based on the positioning information when the information indicates that the mobile compute ...


7
John F Schipper, James M Janky: Hybrid monitoring of location of a site confinee. Trimble Navigation, John Schipper, April 6, 1999: US05892454 (243 worldwide citation)

Method and apparatus for monitoring present location of a person ("confinee") who is to be confined to a designated site, which site can have a diameter as small as a few meters or as large as several kilometers. The present location of the confinee is checked at selected time intervals with time pe ...


8
Peter Van Wyck Loomis, James M Janky, John F Schipper: Portable hybrid location determination system. Trimble Navigation, John Schipper, August 10, 1999: US05936572 (223 worldwide citation)

Apparatus and method for determining the present location of a mobile user that carries the apparatus inside or outside buildings and structures within a region R. The apparatus includes a radio location determination (LD) signal module that receives radiowaves from at least three radio LD signal so ...


9
Thomas W Ellis, Kiyoko M Mura Smith, Charles N Branch, John F Schipper: Map transmission for in-vehicle navigation system with dynamic scale/detail adjustment. Trimble Navigation, Wagner Murabito & Hao, December 16, 1997: US05699255 (188 worldwide citation)

An apparatus and method for providing map information of varying resolution to a navigation device. In one embodiment, a position determining system is attached to a navigation device. The position determining system generates position information, such as location, of the navigation device. The pos ...


10
Raul Y Tan, David W Myers, Robert G Ozarski, John F Schipper, Michael P C Watts: Method for film thickness and refractive index determination. John F Schipper, Harold Huberfeld, March 20, 1990: US04909631 (114 worldwide citation)

Two methods for determination of thickness of a film of known material that is mounted on one face of a solid substrate of known material are disclosed, using: (1) inversion of an optical beam reflectivity equation; or (2) determination of the film thickness that minimizes the variance of the optica ...