Inventor · disambiguated record
John Robert Sheahan
Also filed as: SHEAHAN JOHN · SHEAHAN JOHN R · SHEAHAN JOHN ROBERT
100 granted patents·15 pending applications·1,286 citations·filing 2004–2021
99Inventor score
Files withSILVERBROOK RES PTY LTD98MEMJET TECHNOLOGY LTD5SHEAHAN JOHN ROBERT4KIA SILVERBROOK2JACKSON PULVER MARK1
Top patents by PatentIndex Score
115 records- 0199US7524007B2Printhead having sequenced nozzle firingSILVERBROOK RES PTY LTD·Filed 2007·Granted Apr 28, 2009·53 cites·16 claims
- 0298US7591523B2Printhead IC with de-activatable temperature sensor and maintenance modeSILVERBROOK RES PTY LTD·Filed 2008·Granted Sep 22, 2009·24 cites·7 claims
- 0398US7465016B2Inkjet printhead having modules with displaced inkjet rowsSILVERBROOK RES PTY LTD·Filed 2007·Granted Dec 16, 2008·36 cites·12 claims
- 0498US7384128B2Printhead IC with nozzle array for linking with adjacent printhead IC'sSILVERBROOK RES PTY LTD·Filed 2006·Granted Jun 10, 2008·80 cites·19 claims
- 0598US7314261B2Printhead module for expelling ink from nozzles in groups, alternately, starting at outside nozzles of each groupSILVERBROOK RES PTY LTD·Filed 2004·Granted Jan 1, 2008·79 cites·24 claims
- 0697US7669956B2Temperature regulated inkjet printheadSILVERBROOK RES PTY LTD·Filed 2008·Granted Mar 2, 2010·17 cites·7 claims
- 0797US7425048B2Printhead IC with de-activatable temperature sensorSILVERBROOK RES PTY LTD·Filed 2006·Granted Sep 16, 2008·22 cites·12 claims
- 0897US7281777B2Printhead module having a communication input for data and controlSILVERBROOK RES PTY LTD·Filed 2004·Granted Oct 16, 2007·62 cites·20 claims
- 0996US7735948B2Printhead having grouped nozzle firingSILVERBROOK RES PTY LTD·Filed 2008·Granted Jun 15, 2010·17 cites·11 claims
- 1096US7658459B2Inkjet printhead integrated circuitSILVERBROOK RES PTY LTD·Filed 2008·Granted Feb 9, 2010·16 cites·8 claims
- 1196US7252353B2Printer controller for supplying data to a printhead module having one or more redundant nozzle rowsSILVERBROOK RES PTY LTD·Filed 2004·Granted Aug 7, 2007·66 cites·38 claims
- 1295US7618109B2Method of operating a thermal bend actuatorSILVERBROOK RES PTY LTD·Filed 2008·Granted Nov 17, 2009·14 cites·7 claims
- 1395US7472978B2Printer controller for nozzle displacement correctionSILVERBROOK RES PTY LTD·Filed 2007·Granted Jan 6, 2009·15 cites·8 claims
- 1495US7425047B2Printhead IC compatible with mutally incompatible print engine controllersSILVERBROOK RES PTY LTD·Filed 2006·Granted Sep 16, 2008·18 cites·19 claims
- 1595US7290852B2Printhead module having a dropped rowSILVERBROOK RES PTY LTD·Filed 2004·Granted Nov 6, 2007·39 cites·21 claims
- 1694US7874631B2Printhead integrated circuit with open actuator testSILVERBROOK RES PTY LTD·Filed 2009·Granted Jan 25, 2011·14 cites·7 claims
- 1794US7604321B2Thermal inkjet printhead with de-clog firing modeSILVERBROOK RES PTY LTD·Filed 2006·Granted Oct 20, 2009·16 cites·19 claims
- 1893US7762639B2Inkjet printer having printhead with multiple controllersSILVERBROOK RES PTY LTD·Filed 2008·Granted Jul 27, 2010·21 cites·7 claims
- 1993US7740334B2Printer system having controller with correction for nozzle displacementSILVERBROOK RES PTY LTD·Filed 2008·Granted Jun 22, 2010·11 cites·8 claims
- 2093US7556331B2Inkjet printer having nozzle displacement correctionSILVERBROOK RES PTY LTD·Filed 2007·Granted Jul 7, 2009·11 cites·11 claims
- 2193US7467836B2Inkjet printer having controller for correcting displaced inkjet nozzlesSILVERBROOK RES PTY LTD·Filed 2007·Granted Dec 23, 2008·10 cites·8 claims
- 2293US7188928B2Printer comprising two uneven printhead modules and at least two printer controllers, one of which sends print data to both of the printhead modulesSILVERBROOK RES PTY LTD·Filed 2004·Granted Mar 13, 2007·35 cites·22 claims
- 2392US8308274B2Printhead integrated circuit with thermally sensing heater elementsSHEAHAN JOHN ROBERT·Filed 2010·Granted Nov 13, 2012·6 cites·5 claims
- 2492US7618107B2Printer with rotated ejection nozzle correctionSILVERBROOK RES PTY LTD·Filed 2008·Granted Nov 17, 2009·9 cites·8 claims
- 2592US7377609B2Printer controller for at least partially compensating for erroneous rotational displacementSILVERBROOK RES PTY LTD·Filed 2004·Granted May 27, 2008·31 cites·21 claims
- 2692US7267417B2Printer controller for supplying data to one or more printheads via serial linksSILVERBROOK RES PTY LTD·Filed 2004·Granted Sep 11, 2007·73 cites·30 claims
- 2791US7722163B2Printhead IC with clock recovery circuitSILVERBROOK RES PTY LTD·Filed 2006·Granted May 25, 2010·9 cites·20 claims
- 2891US7281330B2Method of manufacturing left-handed and right-handed printhead modulesSILVERBROOK RES PTY LTD·Filed 2004·Granted Oct 16, 2007·31 cites·5 claims
- 2991US7163345B2Printhead having printhead modules vertically offset at join regionSILVERBROOK RES PTY LTD·Filed 2005·Granted Jan 16, 2007·18 cites·10 claims
- 3090US7891749B2Printhead IC with multiple operating modesSILVERBROOK RES PTY LTD·Filed 2010·Granted Feb 22, 2011·5 cites·19 claims
- 3190US7484831B2Printhead module having horizontally grouped firing orderSILVERBROOK RES PTY LTD·Filed 2004·Granted Feb 3, 2009·27 cites·17 claims
- 3289US7093989B2Printer comprising two uneven printhead modules and at least two printer controllers, one which spends print data to the otherSILVERBROOK RES PTY LTD·Filed 2004·Granted Aug 22, 2006·42 cites·42 claims
- 3388US7607757B2Printer controller for supplying dot data to at least one printhead module having faulty nozzleSILVERBROOK RES PTY LTD·Filed 2004·Granted Oct 27, 2009·43 cites·40 claims
- 3488US7600843B2Printer controller for controlling a printhead module based on thermal sensingSILVERBROOK RES PTY LTD·Filed 2004·Granted Oct 13, 2009·25 cites·40 claims
- 3585US8123318B2Printhead having controlled nozzle firing groupingWALMSLEY SIMON ROBERT·Filed 2010·Granted Feb 28, 2012·3 cites·7 claims
- 3685US7669955B2Inkjet printhead with temperature zonesSILVERBROOK RES PTY LTD·Filed 2008·Granted Mar 2, 2010·4 cites·9 claims
- 3785US7374266B2Method for at least partially compensating for errors in ink dot placement due to erroneous rotational displacementSILVERBROOK RES PTY LTD·Filed 2004·Granted May 20, 2008·31 cites·21 claims
- 3885US7328956B2Printer comprising a printhead and at least two printer controllers connected to a common input of the printheadSILVERBROOK RES PTY LTD·Filed 2004·Granted Feb 12, 2008·27 cites·25 claims
- 3984US7549715B2Printer controller for causing expulsion of ink from nozzles in groups, starting at outside nozzles of groupsSILVERBROOK RES PTY LTD·Filed 2004·Granted Jun 23, 2009·21 cites·48 claims
- 4082US7866778B2Printhead module having nozzle redundancy for faulty nozzle toleranceSILVERBROOK RES PTY LTD·Filed 2004·Granted Jan 11, 2011·22 cites·10 claims
- 4182US7427117B2Method of expelling ink from nozzles in groups, alternately, starting at outside nozzles of each groupSILVERBROOK RES PTY LTD·Filed 2004·Granted Sep 23, 2008·17 cites·21 claims
- 4281US7819494B2Printhead IC with multi-stage print data loading and firingSILVERBROOK RES PTY LTD·Filed 2006·Granted Oct 26, 2010·6 cites·4 claims
- 4381US7275805B2Printhead comprising different printhead modulesSILVERBROOK RES PTY LTD·Filed 2004·Granted Oct 2, 2007·17 cites·13 claims
- 4480US7413288B2Externally applied write addresses for printhead integrated circuitsSILVERBROOK RES PTY LTD·Filed 2006·Granted Aug 19, 2008·4 cites·20 claims
- 4579US8075099B2Printer with controller for generating combined print data and clock signalSHEAHAN JOHN ROBERT·Filed 2010·Granted Dec 13, 2011·2 cites·20 claims
- 4679US8016389B2Printhead IC with staggered nozzle firing pulsesSILVERBROOK RES PTY LTD·Filed 2006·Granted Sep 13, 2011·5 cites·19 claims
- 4778US7918524B2Printhead integrated circuit having sensing and test circuitrySILVERBROOK RES PTY LTD·Filed 2010·Granted Apr 5, 2011·1 cites·5 claims
- 4878US7390071B2Printer controller for supplying data to a printhead module having a dropped rowSILVERBROOK RES PTY LTD·Filed 2004·Granted Jun 24, 2008·15 cites·11 claims
- 4977US7758147B2Printhead module having operation controllable on basis of thermal sensorsSILVERBROOK RES PTY LTD·Filed 2008·Granted Jul 20, 2010·3 cites·6 claims
- 5076US7938500B2Printhead IC with multiple temperature sensorsSILVERBROOK RES PTY LTD·Filed 2006·Granted May 10, 2011·4 cites·16 claims
Showing the top 50 of 115 patent records by PatentIndex Score.
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