Inventor
GRAGG BRIAN D
US14 patents
⚠️ This page may combine multiple inventors who share the name “GRAGG BRIAN D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD CO
10 patentsUS5467118ANov 14, 1995
Ink cartridge for a hard copy printing or plotting apparatus
HEWLETT PACKARD CO239 citations99
US5757390AMay 26, 1998
Ink volume sensing and replenishing system
HEWLETT PACKARD CO139 citations98
US5754207AMay 19, 1998
Volume indicating ink reservoir cartridge system
HEWLETT PACKARD CO102 citations98
US5519422AMay 21, 1996
Method and device for preventing unintended use of print cartridges
HEWLETT PACKARD CO107 citations96
US5912688AJun 15, 1999
Spring bag based, off axis ink delivery system and pump trigger
HEWLETT PACKARD CO86 citations95
US5886718AMar 23, 1999
Ink-jet off axis ink delivery system
HEWLETT PACKARD CO85 citations95
US5574490ANov 12, 1996
Ink jet hard copy apparatus ink cartridge
HEWLETT PACKARD CO27 citations92
US5969739AOct 19, 1999
Ink-jet pen with rectangular ink pipe
HEWLETT PACKARD CO45 citations91
US5877795AMar 2, 1999
Methods and designs to purge air from ink tubes during initial startup
HEWLETT PACKARD CO47 citations91
US4806032AFeb 21, 1989
Conical vent containing capillary bore
HEWLETT PACKARD CO40 citations91
HEWLETT PACKARD DEVELOPMENT CO
3 patentsUS7712862B1May 11, 2010
Ink stalagmite detection
HEWLETT PACKARD DEVELOPMENT CO5 citations59
US7774557B2Aug 10, 2010
Storage access system and method for image forming device
HEWLETT PACKARD DEVELOPMENT CO0 citations51
US7301657B2Nov 27, 2007
Printer including video decoder
HEWLETT PACKARD DEVELOPMENT CO0 citations42