Inventor · disambiguated record
William F. Ray
Also filed as: RAY WILLIAM F · RAY WILLIAM FREDERICK
15 granted patents·589 citations·filing 1978–2013
95Inventor score
Files withSWITCHED RELUCTANCE DRIVES LTD5CHLORIDE GROUP LTD3CHLORIDE GROUP PLC2HEWSON CHRISTOPHER R1POWER ELECTRONIC MEASUREMENTS1
Top patents by PatentIndex Score
15 records- 0194US5467025ASensorless rotor position measurement in electric machinesSWITCHED RELUCTANCE DRIVES LTD·Filed 1993·Granted Nov 14, 1995·93 cites·22 claims
- 0292US4253053AReluctance electric motor drive systemsCHLORIDE GROUP LTD·Filed 1978·Granted Feb 24, 1981·47 cites·16 claims
- 0391US6614218B1Current measuring devicePOWER ELECTRONIC MEASUREMENTS·Filed 1999·Granted Sep 2, 2003·123 cites·16 claims
- 0486US4563619AElectric power converter circuitCHLORIDE GROUP PLC·Filed 1982·Granted Jan 7, 1986·39 cites·10 claims
- 0580US5545964AControl of switched reluctance machinesSWITCHED RELUCTANCE DRIVES LTD·Filed 1995·Granted Aug 13, 1996·40 cites·34 claims
- 0678US5469039AControl of switched reluctance machinesSWITCHED RELUCTANCE DRIVES LTD·Filed 1992·Granted Nov 21, 1995·40 cites·38 claims
- 0777US4348619AVariable reluctance electric motor systemsCHLORIDE GROUP LTD·Filed 1979·Granted Sep 7, 1982·38 cites·16 claims
- 0874US4387326AVariable reluctance motor systemsCHLORIDE GROUP LTD·Filed 1980·Granted Jun 7, 1983·24 cites·19 claims
- 0973US5563488AControl of switched reluctance machinesSWITCHED RELUCTANCE DRIVES LTD·Filed 1995·Granted Oct 8, 1996·30 cites·20 claims
- 1072US5380994AMicrocomputer adapted for inventory controlSCIENCE AND TECHNOLOGY INC·Filed 1993·Granted Jan 10, 1995·56 cites·10 claims
- 1168US4360770AVariable reluctance motor systemsCHLORIDE GROUP PLC·Filed 1979·Granted Nov 23, 1982·15 cites·16 claims
- 1263US5804941ADual mode position control system with speed profilingSWITCHED RELUCTANCE DRIVES LTD·Filed 1997·Granted Sep 8, 1998·30 cites·27 claims
- 1356US4835408APower conversion circuitTASC DRIVES LTD·Filed 1982·Granted May 30, 1989·13 cites·13 claims
- 1448US9970963B2Temperature compensated current measurementPOWER ELECTRONIC MEASUREMENTS LTD·Filed 2013·Granted May 15, 2018·1 cites·9 claims
- 1528US9606152B2Apparatus for current measurementHEWSON CHRISTOPHER R·Filed 2012·Granted Mar 28, 2017·0 cites·19 claims
Join the waitlist — get patent alerts
Get an alert when William F. Ray files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →