Inventor
TRASK JEFFREY L
US19 patents
⚠️ This page may combine multiple inventors who share the name “TRASK JEFFREY L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HEWLETT PACKARD CO
15 patentsUS4999646AMar 12, 1991
Method for enhancing the uniformity and consistency of dot formation produced by color ink jet printing
HEWLETT PACKARD CO156 citations98
US5116034AMay 26, 1992
Envelope/sheet feed mechanism
HEWLETT PACKARD CO69 citations95
US6549303B1Apr 15, 2003
Trapping methods and arrangements for use in printing color images
HEWLETT PACKARD CO51 citations92
US6249355B1Jun 19, 2001
System providing hybrid halftone
HEWLETT PACKARD CO42 citations92
US6169609B1Jan 2, 2001
Imaging device and method for implementing a color map with K-only black point while reducing interpolator artifacts
HEWLETT PACKARD CO21 citations92
US5898505AApr 27, 1999
Resolution enhancement procedure and apparatus for a color laser printer
HEWLETT PACKARD CO33 citations92
US5610692AMar 11, 1997
Toner hopper lockout mechanism
HEWLETT PACKARD CO19 citations92
US5252995AOct 12, 1993
Color boundary enhancement in a multi-color electrostatic printer
HEWLETT PACKARD CO33 citations92
US5196897AMar 23, 1993
High speed duplex printing mechanism having plural reversing pathways
HEWLETT PACKARD CO25 citations92
US5657430AAug 12, 1997
Software-based procedure for conversion of a scalable font character bitmap to a gray level bitmap
HEWLETT PACKARD CO22 citations91
US6034711AMar 7, 2000
Self-indicating test page for use in setting density level and color balance in a color laser printer
HEWLETT PACKARD CO18 citations82
US5793406AAug 11, 1998
Adjustment of dot size for laser imagers
HEWLETT PACKARD CO18 citations79
US5802435ASep 1, 1998
Toner hopper lockout mechanism
HEWLETT PACKARD CO6 citations74
US5754751AMay 19, 1998
Software-based procedure and apparatus for enhancement of a gray level image
HEWLETT PACKARD CO7 citations73
US4583660AApr 22, 1986
Vibratory toner dispensing system
HEWLETT PACKARD CO14 citations64
HEWLETT PACKARD DEVELOPMENT CO
3 patentsUS7676171B2Mar 9, 2010
Printing device and method for switching between monochrome and color modes
HEWLETT PACKARD DEVELOPMENT CO10 citations83
US7688341B2Mar 30, 2010
Laser jet bow/tilt correction
HEWLETT PACKARD DEVELOPMENT CO3 citations61
US7061514B2Jun 13, 2006
Scanning system
HEWLETT PACKARD DEVELOPMENT CO5 citations54