Inventor

KEITH JOHN C

9 patents

Patents

9 patents

US3971925AJul 27, 1976

Adaptable programmed calculator having provision for plug-in keyboard and memory modules

HEWLETT PACKARD CO47 citations90

US5293593AMar 8, 1994

Method and apparatus for the mapping of physically non-contiguous memory fragments to be linearly addressable

HEWLETT PACKARD CO33 citations87

US4181966AJan 1, 1980

Adaptable programmed calculator including a percent keyboard operator

HEWLETT PACKARD CO21 citations80

US4707571ANov 17, 1987

Ergonomic digitizer stylus

HEWLETT PACKARD CO15 citations71

US4697048ASep 29, 1987

Graphics tablet menu locator accommodating differing sizes of paper

HEWLETT PACKARD CO11 citations71

US4089059AMay 9, 1978

Programmable calculator employing a read-write memory having a movable boundary between program and data storage sections thereof

HEWLETT PACKARD CO17 citations69

US4156921AMay 29, 1979

Adaptable programmed calculator including automatic decimal point positioning

HEWLETT PACKARD CO5 citations60

US4566072AJan 21, 1986

Programmable calculator including means for digitizing the position of an X-Y plotter pen

HEWLETT PACKARD CO3 citations58

US4330839AMay 18, 1982

Programmable calculator including means for automatically processing imformation stored on a magnetic record member

HEWLETT PACKARD CO2 citations57