Inventor · disambiguated record
Elmer J. Simpson
Also filed as: SIMPSON ELMER · SIMPSON ELMER J
5 granted patents·95 citations·filing 1980–1993
81Inventor score
Top patents by PatentIndex Score
5 records- 0173US4363380AElevator and method of liftingRUED GLEN A·Filed 1980·Granted Dec 14, 1982·29 cites·9 claims
- 0272US5471359APolyphase current monitor and control systemIMPCO INC·Filed 1993·Granted Nov 28, 1995·43 cites·20 claims
- 0347US4311212AValve control systemELEVATOR EQUIP·Filed 1980·Granted Jan 19, 1982·12 cites·17 claims
- 0431US4979069AMotor fault detector with optical isolationELMER SIMPSON & EDGAR POWELL·Filed 1987·Granted Dec 18, 1990·8 cites·17 claims
- 0525US4345507AElevator fluid flow control valveELEVATOR EQUIP·Filed 1980·Granted Aug 24, 1982·3 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →