Inventor · disambiguated record
Donald A. Holtkamp
Also filed as: HOLTKAMP DONALD A
3 granted patents·96 citations·filing 1974–1975
74Inventor score
Files withCLARK EQUIPMENT CO3
Top patents by PatentIndex Score
3 records- 0193US3978937AHydrostatic propulsion systemCLARK EQUIPMENT CO·Filed 1974·Granted Sep 7, 1976·67 cites·30 claims
- 0258US3978771AMechanical piston retention for free wheelingCLARK EQUIPMENT CO·Filed 1975·Granted Sep 7, 1976·17 cites·4 claims
- 0352US4062269AHydraulic cylinder extension controlCLARK EQUIPMENT CO·Filed 1975·Granted Dec 13, 1977·12 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →