Inventor · disambiguated record
Charles J. Sperr, Jr.
Also filed as: SPERR CHARLES J · SPERR JR CHARLES J
5 granted patents·93 citations·filing 1975–1988
82Inventor score
Top patents by PatentIndex Score
5 records- 0167US4379712AEvaporative coolerSPERR JR CHARLES J·Filed 1981·Granted Apr 12, 1983·26 cites·4 claims
- 0258US4752419AEvaporative coolerSPERR JR CHARLES J·Filed 1986·Granted Jun 21, 1988·22 cites·12 claims
- 0355US4576013AEvaporative coolingSPERR CHARLES J·Filed 1984·Granted Mar 18, 1986·18 cites·14 claims
- 0455US3992690AComposite electromagnetic coilGARRETT CORP·Filed 1975·Granted Nov 16, 1976·10 cites·9 claims
- 0551US4851162AEvaporative coolerSPERR JR CHARLES J·Filed 1988·Granted Jul 25, 1989·17 cites·18 claims
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