Inventor · disambiguated record
Michael Duffield
Also filed as: DUFFIELD MICHAEL · DUFFIELD MICHAEL C
15 granted patents·1 pending application·514 citations·filing 1997–2018
94Inventor score
Top patents by PatentIndex Score
16 records- 0198US6311655B1Multi-position variable cam timing system having a vane-mounted locking-piston deviceBORGWARNER INC·Filed 2000·Granted Nov 6, 2001·95 cites·19 claims
- 0297US6763791B2Cam phaser for engines having two check valves in rotor between chambers and spool valveBORGWARNER INC·Filed 2002·Granted Jul 20, 2004·77 cites·14 claims
- 0397US6374787B2Multi-position variable camshaft timing system actuated by engine oil pressureBORGWARNER INC·Filed 2001·Granted Apr 23, 2002·58 cites·23 claims
- 0496US5967921AHydraulic chain tensioner with molded plastic bodyBORG WARNER AUTOMOTIVE·Filed 1997·Granted Oct 19, 1999·92 cites·10 claims
- 0594US6883481B2Torsional assisted multi-position cam indexer having controls located in rotorBORGWARNER INC·Filed 2003·Granted Apr 26, 2005·45 cites·12 claims
- 0693US6247434B1Multi-position variable camshaft timing system actuated by engine oilBORGWARNER INC·Filed 1999·Granted Jun 19, 2001·55 cites·23 claims
- 0791US6612952B1Blade tensioner having spring blade cantilevered from distal end of armBORGWARNER INC·Filed 1999·Granted Sep 2, 2003·49 cites·23 claims
- 0889US8574740B2Molded frame with corrugated cooling fin for air-cooled batteryQUICK MEGAN J·Filed 2010·Granted Nov 5, 2013·16 cites·18 claims
- 0987US9065158B2Corrugated fin and frame assembly for battery coolingMARTZ WILLIAM L·Filed 2010·Granted Jun 23, 2015·12 cites·17 claims
- 1081US8673480B2Support feature for joining of battery cell tabsBARTER STUART D·Filed 2010·Granted Mar 18, 2014·4 cites·20 claims
- 1173US10096813B2Battery design with bussing integral to battery assemblySAFT GROUPE SA·Filed 2014·Granted Oct 9, 2018·1 cites·14 claims
- 1267US10615397B2Battery design with bussing integral to battery assemblySAFT GROUPE SA·Filed 2018·Granted Apr 7, 2020·0 cites·14 claims
- 1367US6814037B1Variable camshaft timing for internal combustion engine with actuator lockingBORGWARNER INC·Filed 2003·Granted Nov 9, 2004·10 cites·4 claims
- 1462US9406918B2Support feature for joining of battery cell tabsGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Aug 2, 2016·0 cites·19 claims
- 1540US8221936B2Method and apparatus for attachment of fuel cell stack manifoldDUFFIELD MICHAEL·Filed 2005·Granted Jul 17, 2012·0 cites·13 claims
- 1636US2003033998A1Hybrid multi-position cam indexer having controls located in rotorFiled 2002·Application pending·0 cites
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