Inventor · disambiguated record
Douglas C. Sperr
Also filed as: SPERR DOUGLAS · SPERR DOUGLAS C
6 granted patents·116 citations·filing 1981–2002
85Inventor score
Top patents by PatentIndex Score
6 records- 0167US4379712AEvaporative coolerSPERR JR CHARLES J·Filed 1981·Granted Apr 12, 1983·26 cites·4 claims
- 0266US7702999B1Network-based, information management system and methodDC FUTURE LLC·Filed 2002·Granted Apr 20, 2010·24 cites·59 claims
- 0358US4752419AEvaporative coolerSPERR JR CHARLES J·Filed 1986·Granted Jun 21, 1988·22 cites·12 claims
- 0455USD296242SMullionSPERR DOUGLAS C·Filed 1985·Granted Jun 14, 1988·9 cites·1 claims
- 0555US4576013AEvaporative coolingSPERR CHARLES J·Filed 1984·Granted Mar 18, 1986·18 cites·14 claims
- 0651US4851162AEvaporative coolerSPERR JR CHARLES J·Filed 1988·Granted Jul 25, 1989·17 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →