Inventor · disambiguated record
Roy W. Blain
Also filed as: BLAIN ROY W
9 granted patents·79 citations·filing 1984–1997
87Inventor score
Files withBLAIN ROY W5
Top patents by PatentIndex Score
9 records- 0170US4637495APressure/viscosity compensated up travel for a hydraulic elevatorBLAIN ROY W·Filed 1985·Granted Jan 20, 1987·24 cites·7 claims
- 0252US4800990AThree speed valve control for high performance hydraulic elevatorBLAIN ROY W·Filed 1987·Granted Jan 31, 1989·14 cites·5 claims
- 0346US5593004AServo control for hydraulic elevatorBLAIN ROY W·Filed 1995·Granted Jan 14, 1997·11 cites·6 claims
- 0443US4601366ADown valve for the down speed control of a hydraulic elevatorBLAIN ROY W·Filed 1984·Granted Jul 22, 1986·9 cites·7 claims
- 0531US6220277B1Flow metering solenoid valveFiled 1997·Granted Apr 24, 2001·5 cites·8 claims
- 0630US5810118AElevator position lockFiled 1996·Granted Sep 22, 1998·5 cites·18 claims
- 0730US5232070AUp leveling control system for small elevatorsBLAIN ROY W·Filed 1991·Granted Aug 3, 1993·5 cites·7 claims
- 0829US5992573AElevator up startFiled 1997·Granted Nov 30, 1999·2 cites·3 claims
- 0929USRE36022EServo control for hydraulic elevatorFiled 1997·Granted Jan 5, 1999·4 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →