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Jeff C Hawkins, Ken L Dulaney, John J Daly, James H McNamara, James F Cole: Hand held computer. Grid Systems Corporation, Townsend & Townsend, July 21, 1992: US05133076 (137 worldwide citation)

A hand held computer of a type used for such activities as taking inventory, recording signatures on delivery, keeping a route agenda, etc. has a large screen and preferably is without a built in keyboard. The tablet type computer is thin in profile, light in weight and is easily carried and used. P ...


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Ken L Dulaney, John J Daly: Battery compartment. Grid Systems Corporation, Townsend & Townsend, May 14, 1991: US05015546 (43 worldwide citation)

A battery compartment for portable electrical equipment such as computers, tape recorders, VCR recorders, camera flash equipment and other such devices has an internal configuration and appropriate electrical connections to receive at least two different types of battery cells which may be of differ ...


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Jeffrey C Hawkins, Ken L Dulaney, Lindsay Sanford: Split screen keyboard emulator. Grid System, WU SHUFANG, December 26, 1990: CN90104376

A system for providing keystroke data to an application program without utilizing a keyboard that simultaneously displays application program graphics and a keyboard representation on different segments of a screen. Keys are selected by touching the screen at the location of the graphic representati ...


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Ken L Dulaney, Phillip Todd Nash: Computer with provision for continued operation during battery change. Grid Systems, YAN CHENGGEN, March 20, 1991: CN90104408

In a battery powered computer, a bridge battery circuit provides power to the computer for a short period of time while the main battery is removed and changed. This enables the computer to be left partially on, but in a quiescent state, without committing the active program and data to disk or card ...