Inventor
HAY ROBERT R
US8 patents
Patents
8 patentsUS4716423ADec 29, 1987
Barrier layer and orifice plate for thermal ink jet print head assembly and method of manufacture
HEWLETT PACKARD CO70 citations95
US4694308ASep 15, 1987
Barrier layer and orifice plate for thermal ink jet printhead assembly
HEWLETT PACKARD CO65 citations95
US4590482AMay 20, 1986
Nozzle test apparatus and method for thermal ink jet systems
HEWLETT PACKARD CO66 citations95
US4535343AAug 13, 1985
Thermal ink jet printhead with self-passivating elements
HEWLETT PACKARD CO109 citations92
US6239879B1May 29, 2001
Non-contacting communication and power interface between a printing engine and peripheral systems attached to replaceable printer component
HEWLETT PACKARD CO28 citations91
US5239431AAug 24, 1993
Head lift limiter for a disk drive
HEWLETT PACKARD CO41 citations88
US4408865AOct 11, 1983
Corona discharge device for electrophotographic charging and potential leveling
HEWLETT PACKARD CO21 citations78
US4197493AApr 8, 1980
Electrostatic voltmeter
HEWLETT PACKARD CO18 citations72