Inventor · disambiguated record
David W. Barrett
Also filed as: BARRETT DAVID W · BARRETT DAVID WAYNE
27 granted patents·1 pending application·592 citations·filing 1992–2015
97Inventor score
Top patents by PatentIndex Score
28 records- 0192US5373120ALinear door motor system for elevatorsOTIS ELEVATOR CO·Filed 1993·Granted Dec 13, 1994·52 cites·20 claims
- 0285US5487449AMagnetic elevator door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jan 30, 1996·40 cites·6 claims
- 0373US5732796AElevator car evacuation deterrent deviceOTIS ELEVATOR CO·Filed 1995·Granted Mar 31, 1998·29 cites·6 claims
- 0470US6641363B2Gas turbine structureROLLS ROYCE PLC·Filed 2002·Granted Nov 4, 2003·32 cites·8 claims
- 0570US5329521AMethod and apparatus for redundant local area network systemsWALSH JEFFREY R·Filed 1992·Granted Jul 12, 1994·90 cites·12 claims
- 0668US5651428AStationary actuator moving vane elevator car door couplingOTIS ELEVATOR CO·Filed 1996·Granted Jul 29, 1997·27 cites·11 claims
- 0766US5612518ALinear induction motor door drive assembly for elevatorsOTIS ELEVATOR CO·Filed 1994·Granted Mar 18, 1997·22 cites·4 claims
- 0866US5454447AElevator hoistway door bolt lockOTIS ELEVATOR CO·Filed 1994·Granted Oct 3, 1995·22 cites·9 claims
- 0965US5857545AElevator system with overlapped roped-coupler segmentsOTIS ELEVATOR CO·Filed 1997·Granted Jan 12, 1999·25 cites·8 claims
- 1062US6874987B2Cooled turbine bladeROLLS ROYCE PLC·Filed 2003·Granted Apr 5, 2005·20 cites·3 claims
- 1161US5651427AElevator door coupling and hold-close apparatusOTIS ELEVATOR CO·Filed 1995·Granted Jul 29, 1997·21 cites·11 claims
- 1260US5816368AElevator cars switch hoistways while traveling verticallyOTIS ELEVATOR CO·Filed 1997·Granted Oct 6, 1998·23 cites·8 claims
- 1360US5503248AMaintaining open loop current drive to linear induction motorOTIS ELEVATOR CO·Filed 1994·Granted Apr 2, 1996·23 cites·6 claims
- 1459US5538106ARotationally stiff elevator car door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jul 23, 1996·18 cites·6 claims
- 1557US5736693AElevator door drive using dual secondary linear induction motorOTIS ELEVATOR CO·Filed 1995·Granted Apr 7, 1998·25 cites·3 claims
- 1654US5509504AVelocity regulated, open current loop, variable voltage, variable frequency, linear induction motor drive for an elevator car doorOTIS ELEVATOR CO·Filed 1994·Granted Apr 23, 1996·20 cites·4 claims
- 1752US5495918ASmooth and quiet linear induction motor elevator door operationOTIS ELEVATOR CO·Filed 1994·Granted Mar 5, 1996·15 cites·4 claims
- 1849US5808246ATriac drive for three-phase line-powered linear induction motor elevator door operatorOTIS ELEVATOR CO·Filed 1995·Granted Sep 15, 1998·15 cites·9 claims
- 1948US5668355AElevator cab door drive systemOTIS ELEVATOR CO·Filed 1994·Granted Sep 16, 1997·13 cites·3 claims
- 2046US8297925B2Aerofoil configurationBARRETT DAVID W·Filed 2007·Granted Oct 30, 2012·3 cites·18 claims
- 2142US5435415ACammed wedge elevator car door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jul 25, 1995·10 cites·8 claims
- 2241US5494137AElevator door mounting systemOTIS ELEVATOR CO·Filed 1994·Granted Feb 27, 1996·12 cites·6 claims
- 2341US5485896ARotary elevator car door couplingOTIS ELEVATOR CO·Filed 1994·Granted Jan 23, 1996·9 cites·4 claims
- 2441US2016184661A1Adjustable putter and related methodsBARRETT DAVID WAYNE·Filed 2015·Application pending·0 cites
- 2539US6616407B2Gas turbine engine guide vaneROLLS ROYCE PLC·Filed 2002·Granted Sep 9, 2003·3 cites·6 claims
- 2639US5682023ATime-optimal control of an AC line-driven linear motor elevator door operatorOTIS ELEVATOR CO·Filed 1995·Granted Oct 28, 1997·9 cites·15 claims
- 2736US5669465AElevator hoistway door bolt lockOTIS ELEVATOR CO·Filed 1995·Granted Sep 23, 1997·8 cites·7 claims
- 2834US5880414AElevator door brake, brake, lock, and hold-openOTIS ELEVATOR CO·Filed 1997·Granted Mar 9, 1999·6 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →