Inventor · disambiguated record
David L. Knierim
Also filed as: KNIERIM DAVID L · KNIERIM DAVID LYELL
90 granted patents·9 pending applications·1,258 citations·filing 1983–2023
99Inventor score
Top patents by PatentIndex Score
99 records- 0197US7296882B2Ink jet printer performance adjustmentXEROX CORP·Filed 2005·Granted Nov 20, 2007·56 cites·22 claims
- 0296US9789697B1Fluid level sensor with combined capacitance and conductanceXEROX CORP·Filed 2016·Granted Oct 17, 2017·38 cites·13 claims
- 0395US8149017B2Low-voltage to high-voltage level translation using capacitive couplingKNIERIM DAVID L·Filed 2010·Granted Apr 3, 2012·19 cites·15 claims
- 0494US9457560B2Method of sensing degradation of piezoelectric actuatorsXEROX CORP·Filed 2014·Granted Oct 4, 2016·9 cites·8 claims
- 0592US10252524B1Print head having ink pressure sensorXEROX CORP·Filed 2017·Granted Apr 9, 2019·4 cites·27 claims
- 0691US10500846B1Print head with integrated jet impedance measurementXEROX CORP·Filed 2018·Granted Dec 10, 2019·3 cites·19 claims
- 0791US8579396B2Fluid level sensing system and methodXEROX CORP·Filed 2012·Granted Nov 12, 2013·6 cites·4 claims
- 0891US7243917B2Print media registration using active tracking of idler rotationXEROX CORP·Filed 2004·Granted Jul 17, 2007·31 cites·9 claims
- 0991US5185599ALocal display bus architecture and communications method for Raster displayTEKTRONIX INC·Filed 1990·Granted Feb 9, 1993·118 cites·35 claims
- 1091US5109520AImage frame buffer access speedup by providing multiple buffer controllers each containing command FIFO buffersTEKTRONIX INC·Filed 1987·Granted Apr 28, 1992·81 cites·8 claims
- 1191US4742474AVariable access frame buffer memoryTEKTRONIX INC·Filed 1985·Granted May 3, 1988·77 cites·9 claims
- 1290US5689288AInk level sensorTEKTRONIX INC·Filed 1994·Granted Nov 18, 1997·95 cites·18 claims
- 1389US8205971B2Electrically grounded inkjet ejector and method for making an electrically grounded inkjet ejectorNEWTON TYGH J·Filed 2010·Granted Jun 26, 2012·13 cites·8 claims
- 1487US8024968B2Apparatus and method for detecting ink in a reservoirXEROX CORP·Filed 2009·Granted Sep 27, 2011·10 cites·20 claims
- 1586US7575293B2Dual drop printing mode using full length waveforms to achieve head drop mass differencesXEROX CORP·Filed 2005·Granted Aug 18, 2009·9 cites·20 claims
- 1685US7543901B2Faster warm-up, lower energy, and quieter modes for solid ink printersXEROX CORP·Filed 2005·Granted Jun 9, 2009·7 cites·6 claims
- 1785US5502468AInk jet print head drive with normalizationTEKTRONIX INC·Filed 1992·Granted Mar 26, 1996·54 cites·38 claims
- 1885US4755810AFrame buffer memoryTEKTRONIX INC·Filed 1985·Granted Jul 5, 1988·55 cites·11 claims
- 1984US7588305B2Dual drop printing mode using full length waveforms to achieve head drop mass differencesXEROX CORP·Filed 2005·Granted Sep 15, 2009·8 cites·18 claims
- 2083US9016816B2System and method for per drop electrical signal waveform modulation for ink drop placement in inkjet printingXEROX CORP·Filed 2013·Granted Apr 28, 2015·5 cites·20 claims
- 2183US5517534APhase locked loop with reduced phase noiseTEKTRONIX INC·Filed 1994·Granted May 14, 1996·50 cites·3 claims
- 2282US7425061B2Ink consumption determinationXEROX CORP·Filed 2005·Granted Sep 16, 2008·7 cites·24 claims
- 2382US6983934B1Print media thickness measurement systemXEROX CORP·Filed 2004·Granted Jan 10, 2006·17 cites·16 claims
- 2482US4586037ARaster display smooth line generationTEKTRONIX INC·Filed 1983·Granted Apr 29, 1986·56 cites·13 claims
- 2581US7753510B2Solid ink composition with post-melt mixingXEROX CORP·Filed 2006·Granted Jul 13, 2010·4 cites·19 claims
- 2681US7556326B2Ink level sensor and method of useXEROX CORP·Filed 2005·Granted Jul 7, 2009·13 cites·17 claims
- 2780US5659587ASpread spectrum phase-locked loop clock generator with VCO driven by a symmetrical voltage ramp signalTEKTRONIX INC·Filed 1994·Granted Aug 19, 1997·45 cites·28 claims
- 2879US6972403B2Position encoderXEROX CORP·Filed 2003·Granted Dec 6, 2005·19 cites·9 claims
- 2978US7926898B2Faster warm-up, lower energy, and quieter modes for solid ink printersXEROX CORP·Filed 2009·Granted Apr 19, 2011·4 cites·7 claims
- 3077US7988274B2Ink consumption determinationXEROX CORP·Filed 2009·Granted Aug 2, 2011·4 cites·15 claims
- 3176US12442838B2Current monitor combining a shunt resistor with a Rogowski coilTEKTRONIX INC·Filed 2023·Granted Oct 14, 2025·0 cites·23 claims
- 3276US9931840B2Systems and methods for heating and measuring temperature of print head jet stacksXEROX CORP·Filed 2013·Granted Apr 3, 2018·2 cites·9 claims
- 3376US7591550B2Ink consumption determinationXEROX CORP·Filed 2005·Granted Sep 22, 2009·4 cites·9 claims
- 3475US5600352AApparatus and method for controlling coalescence of ink drops on a print mediumTEKTRONIX INC·Filed 1994·Granted Feb 4, 1997·54 cites·22 claims
- 3574US8226187B2Tilt mitigation methods to control reservoir ink level and printhead pressureSNYDER TREVOR JAMES·Filed 2010·Granted Jul 24, 2012·2 cites·19 claims
- 3673US4780755AFrame buffer self-testTEKTRONIX INC·Filed 1987·Granted Oct 25, 1988·27 cites·13 claims
- 3772US8382221B2Fluid level sensing system and methodXEROX CORP·Filed 2008·Granted Feb 26, 2013·3 cites·7 claims
- 3872US8075118B2Segmented ink stickCHAMBERS RICHARD G·Filed 2010·Granted Dec 13, 2011·2 cites·8 claims
- 3972US7405393B2Position encoderXEROX CORP·Filed 2005·Granted Jul 29, 2008·3 cites·12 claims
- 4072US4646078AGraphics display rapid pattern fill using undisplayed frame buffer memoryTEKTRONIX INC·Filed 1984·Granted Feb 24, 1987·28 cites·13 claims
- 4169US7641327B2Replaceable ink stick guides and supportsXEROX CORP·Filed 2006·Granted Jan 5, 2010·1 cites·19 claims
- 4269US7019560B2High voltage level translatorXEROX CORP·Filed 2003·Granted Mar 28, 2006·12 cites·22 claims
- 4368US12350930B2Print head angle and stitch alignment during full speed printer operationXEROX CORP·Filed 2023·Granted Jul 8, 2025·0 cites·10 claims
- 4468US7753509B2Segmented ink stickXEROX CORP·Filed 2006·Granted Jul 13, 2010·2 cites·9 claims
- 4567US8615881B2Oleophobic ink jet orifice plateKNIERIM DAVID L·Filed 2012·Granted Dec 31, 2013·1 cites·17 claims
- 4666US8226185B2Drive belt slip and belt wear detectionJONES MICHAEL EUGENE·Filed 2008·Granted Jul 24, 2012·6 cites·16 claims
- 4766US7695126B2Ink loader mechanism using an ink stick carrierXEROX CORP·Filed 2006·Granted Apr 13, 2010·2 cites·19 claims
- 4866US7021739B2Ink jet processesXEROX CORP·Filed 2003·Granted Apr 4, 2006·11 cites·16 claims
- 4966US6076922AMethod and apparatus for generating a dot clock signal for controlling operation of a print headTEKTRONICS INC·Filed 1997·Granted Jun 20, 2000·30 cites·12 claims
- 5065US9925773B2Tin-silver diffusion soldering for thin joints without fluxXEROX CORP·Filed 2016·Granted Mar 27, 2018·0 cites·9 claims
Showing the top 50 of 99 patent records by PatentIndex Score.
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