Inventor · disambiguated record
Jeffrey L. Trask
Also filed as: TRASK JEFFREY L
18 granted patents·1 pending application·560 citations·filing 1982–2012
96Inventor score
Top patents by PatentIndex Score
19 records- 0195US5116034AEnvelope/sheet feed mechanismHEWLETT PACKARD CO·Filed 1990·Granted May 26, 1992·69 cites·17 claims
- 0295US4999646AMethod for enhancing the uniformity and consistency of dot formation produced by color ink jet printingHEWLETT PACKARD CO·Filed 1989·Granted Mar 12, 1991·156 cites·8 claims
- 0388US7676171B2Printing device and method for switching between monochrome and color modesHEWLETT PACKARD DEVELOPMENT CO·Filed 2007·Granted Mar 9, 2010·10 cites·24 claims
- 0478US5196897AHigh speed duplex printing mechanism having plural reversing pathwaysHEWLETT PACKARD CO·Filed 1991·Granted Mar 23, 1993·25 cites·8 claims
- 0576US5610692AToner hopper lockout mechanismHEWLETT PACKARD CO·Filed 1994·Granted Mar 11, 1997·19 cites·5 claims
- 0675US6549303B1Trapping methods and arrangements for use in printing color imagesHEWLETT PACKARD CO·Filed 1999·Granted Apr 15, 2003·51 cites·14 claims
- 0772US6249355B1System providing hybrid halftoneHEWLETT PACKARD CO·Filed 1998·Granted Jun 19, 2001·42 cites·27 claims
- 0872US5252995AColor boundary enhancement in a multi-color electrostatic printerHEWLETT PACKARD CO·Filed 1992·Granted Oct 12, 1993·33 cites·6 claims
- 0966US5898505AResolution enhancement procedure and apparatus for a color laser printerHEWLETT PACKARD CO·Filed 1997·Granted Apr 27, 1999·33 cites·7 claims
- 1063US4583660AVibratory toner dispensing systemHEWLETT PACKARD CO·Filed 1982·Granted Apr 22, 1986·14 cites·4 claims
- 1159US7061514B2Scanning systemHEWLETT PACKARD DEVELOPMENT CO·Filed 2004·Granted Jun 13, 2006·5 cites·39 claims
- 1258US6169609B1Imaging device and method for implementing a color map with K-only black point while reducing interpolator artifactsHEWLETT PACKARD CO·Filed 1998·Granted Jan 2, 2001·21 cites·21 claims
- 1357US5657430ASoftware-based procedure for conversion of a scalable font character bitmap to a gray level bitmapHEWLETT PACKARD CO·Filed 1996·Granted Aug 12, 1997·22 cites·9 claims
- 1455US5687054ACorona charging apparatusKONISHIROKU PHOTO IND·Filed 1996·Granted Nov 11, 1997·11 cites·7 claims
- 1554US6034711ASelf-indicating test page for use in setting density level and color balance in a color laser printerHEWLETT PACKARD CO·Filed 1996·Granted Mar 7, 2000·18 cites·11 claims
- 1651US5793406AAdjustment of dot size for laser imagersHEWLETT PACKARD CO·Filed 1996·Granted Aug 11, 1998·18 cites·15 claims
- 1745US5802435AToner hopper lockout mechanismHEWLETT PACKARD CO·Filed 1996·Granted Sep 1, 1998·6 cites·5 claims
- 1837US5754751ASoftware-based procedure and apparatus for enhancement of a gray level imageHEWLETT PACKARD CO·Filed 1996·Granted May 19, 1998·7 cites·7 claims
- 1937US2014178084A1Machine learning based tone consistency calibration decisionsHEWLETT PACKARD DEVELOPMENT CO·Filed 2012·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Jeffrey L. Trask files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →