Inventor
BALDWIN MARC A
US17 patents
⚠️ This page may combine multiple inventors who share the name “BALDWIN MARC A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD DEVELOPMENT CO
8 patentsUS7510274B2Mar 31, 2009
Ink delivery system and methods for improved printing
HEWLETT PACKARD DEVELOPMENT CO7 citations73
US7997698B2Aug 16, 2011
Ink delivery system and methods for improved printing
HEWLETT PACKARD DEVELOPMENT CO2 citations62
US7533976B2May 19, 2009
Sealing component defining first, second, and third seals
HEWLETT PACKARD DEVELOPMENT CO4 citations61
US7669995B2Mar 2, 2010
Sealing component defining first, second, and third seals
HEWLETT PACKARD DEVELOPMENT CO0 citations50
US7610680B2Nov 3, 2009
Methods for creating channels
HEWLETT PACKARD DEVELOPMENT CO0 citations48
US7299552B2Nov 27, 2007
Methods for creating channels
HEWLETT PACKARD DEVELOPMENT CO1 citations48
US7950791B2May 31, 2011
Ink level detection by electronic means
HEWLETT PACKARD DEVELOPMENT CO0 citations40
US7862161B2Jan 4, 2011
Ink detector viewable with the human eye
HEWLETT PACKARD DEVELOPMENT CO0 citations40
HEWLETT PACKARD CO
6 patentsUS5600358AFeb 4, 1997
Ink pen having a hydrophobic barrier for controlling ink leakage
HEWLETT PACKARD CO160 citations96
US5537134AJul 16, 1996
Refill method for ink-jet print cartridge
HEWLETT PACKARD CO69 citations95
US5363130ANov 8, 1994
Method of valving and orientation sensitive valve including a liquid for controlling flow of gas into a container
HEWLETT PACKARD CO61 citations95
US5526030AJun 11, 1996
Pressure control apparatus for an ink pen
HEWLETT PACKARD CO85 citations94
US5505339AApr 9, 1996
Pressure-sensitive accumulator for ink-jet pens
HEWLETT PACKARD CO47 citations93
US5917523AJun 29, 1999
Refill method for ink-jet print cartridge
HEWLETT PACKARD CO47 citations92