Inventor · disambiguated record
James K. Elfstrand
Also filed as: ELFSTRAND JAMES K
8 granted patents·239 citations·filing 1996–2000
90Inventor score
Technology areasB01D
Files withDONALDSON CO INC8
Top patents by PatentIndex Score
8 records- 0188USD404807SFilter sleeveDONALDSON CO INC·Filed 1996·Granted Jan 26, 1999·37 cites·1 claims
- 0286US5858044AFilter arrangement including removable filter with first and second media secured togetherDONALDSON CO INC·Filed 1996·Granted Jan 12, 1999·67 cites·13 claims
- 0385USD407808SFilter element having circular sleeveDONALDSON CO INC·Filed 1996·Granted Apr 6, 1999·32 cites·1 claims
- 0480USD402361SPanel filter constructionDONALDSON CO INC·Filed 1996·Granted Dec 8, 1998·24 cites·1 claims
- 0570US6340375B1Air cleaner; method and useDONALDSON CO INC·Filed 2000·Granted Jan 22, 2002·15 cites·17 claims
- 0667US6059851AAir cleaner; method and useDONALDSON CO INC·Filed 1998·Granted May 9, 2000·31 cites·20 claims
- 0763US6015452AMethod of servicing an air cleaner and of filtering engine intake air using prefilter arrangementsDONALDSON CO INC·Filed 1999·Granted Jan 18, 2000·26 cites·19 claims
- 0849USD418592SAir cleanerDONALDSON CO INC·Filed 1998·Granted Jan 4, 2000·7 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →