Inventor
CHRISTOPHER CHRIS J
7 patents
Patents
7 patentsUS4012725AMar 15, 1977
Programmable calculator
HEWLETT PACKARD CO35 citations90
US4075679AFeb 21, 1978
Programmable calculator
HEWLETT PACKARD CO43 citations89
US4366553ADec 28, 1982
Electronic computing apparatus employing basic language
HEWLETT PACKARD CO7 citations71
US4322816AMar 30, 1982
Programmable calculator having structure for controlling an x-y plotter
HEWLETT PACKARD CO9 citations71
US4437156AMar 13, 1984
Programmable calculator
HEWLETT PACKARD CO16 citations70
US4127897ANov 28, 1978
Programmable calculator having extended input/output capability
HEWLETT PACKARD CO4 citations60
US4546448AOct 8, 1985
Programmable calculator including program variable initialization means and definition means array
HEWLETT PACKARD CO0 citations49