Inventor · disambiguated record
Jack Stifelman
Also filed as: FISHER PATRICK · STIFELMAN JACK
8 granted patents·1 pending application·648 citations·filing 1981–2005
91Inventor score
Top patents by PatentIndex Score
9 records- 0196US5104537AHigh pressure hydraulic spin-on filterDONALDSON CO INC·Filed 1990·Granted Apr 14, 1992·200 cites·21 claims
- 0295US4369113AHigh strength spin-on filterDONALDSON CO INC·Filed 1981·Granted Jan 18, 1983·111 cites·23 claims
- 0392US4743374AHigh-strength filter with improved fatigue ratingDONALDSON CO INC·Filed 1987·Granted May 10, 1988·92 cites·10 claims
- 0489US4615800ADuplex filter apparatusDONALDSON CO INC·Filed 1985·Granted Oct 7, 1986·78 cites·5 claims
- 0585US4480160ADifferential pressure switchDONALDSON CO INC·Filed 1982·Granted Oct 30, 1984·28 cites·20 claims
- 0678US6217755B1In-tank fluid filter with valve assemblyDONALDSON CO INC·Filed 1998·Granted Apr 17, 2001·56 cites·18 claims
- 0775US6024869ASpin-on filter assembly with valve arrangementsDONALDSON CO INC·Filed 1998·Granted Feb 15, 2000·53 cites·20 claims
- 0869US4883083ARelief valve assembly; piston member from same and filter head assembly incorporating sameDONALDSON CO INC·Filed 1988·Granted Nov 28, 1989·30 cites·17 claims
- 0942US2006021925A1Re-usable structure which attaches to the same filter head as originally intended to receive a throw-away spin-onSTIFELMAN JACK·Filed 2005·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →