Inventor · disambiguated record
Ray A. Walker
Also filed as: WALKER RAY · WALKER RAY A · WALKER RAY ALLEN
21 granted patents·4 pending applications·1,360 citations·filing 1977–2018
97Inventor score
Files withHEWLETT PACKARD CO9HEWLETT PACKARD DEVELOPMENT CO7WALKER RAY A3BATTELLE MEMORIAL INSTITUTE1PSC INC1
Top patents by PatentIndex Score
25 records- 0198US6312106B1Method and apparatus for transferring information between a replaceable consumable and a printing deviceHEWLETT PACKARD CO·Filed 1999·Granted Nov 6, 2001·200 cites·22 claims
- 0298US6302527B1Method and apparatus for transferring information between a printer portion and a replaceable printing componentHEWLETT PACKARD CO·Filed 1999·Granted Oct 16, 2001·153 cites·21 claims
- 0397US6312074B1Method and apparatus for detecting fluid level in a fluid containerHEWLETT PACKARD CO·Filed 1999·Granted Nov 6, 2001·145 cites·6 claims
- 0494US6648434B2Digitally compensated pressure ink level sense system and methodHEWLETT PACKARD DEVELOPMENT CO·Filed 2001·Granted Nov 18, 2003·58 cites·18 claims
- 0594US4129384AOptical extensometerBATTELLE MEMORIAL INSTITUTE·Filed 1977·Granted Dec 12, 1978·86 cites·24 claims
- 0687US6345891B1Method and apparatus for specifying ink volume in a multichamber ink containerHEWLETT PACKARD CO·Filed 2000·Granted Feb 12, 2002·31 cites·17 claims
- 0785US6929343B2Fluid detection systemHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted Aug 16, 2005·28 cites·52 claims
- 0884US6863377B2Method and apparatus for identifying a sales channelHEWLETT PACKARD DEVELOPMENT CO·Filed 2002·Granted Mar 8, 2005·17 cites·38 claims
- 0984US5883370AAutomated method for filling drug prescriptionsPSC INC·Filed 1996·Granted Mar 16, 1999·471 cites·13 claims
- 1083US10867002B1Real estate search interface and methodWALKER RAY A·Filed 2018·Granted Dec 15, 2020·4 cites·21 claims
- 1179US6513901B1Method and apparatus for determining drop volume from a drop ejection deviceHEWLETT PACKARD CO·Filed 2001·Granted Feb 4, 2003·19 cites·20 claims
- 1279US6274880B1Fluid level sensing system and method having controlled surface pairsHEWLETT PACKARD CO·Filed 1998·Granted Aug 14, 2001·43 cites·9 claims
- 1375US6676240B2Method and apparatus for transferring information between a replaceable consumable and a printing deviceHEWLETT PACKARD DEVELOPMENT CO·Filed 2001·Granted Jan 13, 2004·14 cites·24 claims
- 1473US6431672B1Ink container having dual capillary members with differing capillary pressures for precise ink level sensingHEWLETT PACKARD CO·Filed 2001·Granted Aug 13, 2002·14 cites·36 claims
- 1563US6739691B2Method and apparatus for preventing theft of replaceable printing componentsHEWLETT PACKARD DEVELOPMENT CO·Filed 2003·Granted May 25, 2004·7 cites·28 claims
- 1657US6685298B2Method and apparatus for preventing theft of replaceable printing componentsHEWLETT PACKARD DEVELOPMENT CO·Filed 2001·Granted Feb 3, 2004·5 cites·2 claims
- 1751US6247775B1Method and apparatus for detecting ink levelHEWLETT PACKARD CO·Filed 1998·Granted Jun 19, 2001·11 cites·15 claims
- 1851US5327451ALaser diode assembly for laser scanner systemSPECTRA PHYSICS SCANNING SYST·Filed 1992·Granted Jul 5, 1994·16 cites·36 claims
- 1947US6494562B1Method and apparatus for identifying a sales channelHEWLETT PACKARD CO·Filed 1999·Granted Dec 17, 2002·28 cites·15 claims
- 2041US4690556ACapillary bore straightness inspectionSPECTRA PHYSICS·Filed 1985·Granted Sep 1, 1987·7 cites·27 claims
- 2141US2005007450A1Vehicle mounted system and method for capturing and processing physical dataFiled 2003·Application pending·0 cites
- 2240US2005264545A1Method and system for determining the location of a movable icon on a display surfaceWALKER RAY A·Filed 2004·Application pending·0 cites
- 2338US7110127B2Method and apparatus for product regionalizationHEWLETT PACKARD DEVELOPMENT CO·Filed 2001·Granted Sep 19, 2006·3 cites·13 claims
- 2433US2003128245A1Method and apparatus for transferring information between a printer portion and a replaceable printing componentFiled 2002·Application pending·0 cites
- 2530US2006082815A1Transceiver controlling a plurality of antennas for communication with wireless memory devices in a printing systemWALKER RAY A·Filed 2004·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Ray A. Walker 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 →