Inventor · disambiguated record
Donald D. Gronholz
Also filed as: GRONHOLZ DONALD D
4 granted patents·350 citations·filing 1976–1985
82Inventor score
Top patents by PatentIndex Score
4 records- 0194US4617122ACrimp seal pleated filter assemblyDONALDSON CO INC·Filed 1984·Granted Oct 14, 1986·222 cites·7 claims
- 0287US4657570AAir filter deviceDONALDSON CO INC·Filed 1985·Granted Apr 14, 1987·40 cites·2 claims
- 0387US4044805ARouter guide unitGRONHOLZ DONALD D·Filed 1976·Granted Aug 30, 1977·60 cites·5 claims
- 0470US4512891APleated filter element with controlled expansibility and frame thereforDONALDSON CO INC·Filed 1982·Granted Apr 23, 1985·28 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →