Inventor · disambiguated record
Donald M. Haarstad
Also filed as: HAARSTAD DONALD M · HAARSTAD DONALD MELVIN
9 granted patents·1 pending application·222 citations·filing 1987–2024
90Inventor score
Top patents by PatentIndex Score
10 records- 0186US4759182ASteering control unit with flow amplificationEATON CORP·Filed 1987·Granted Jul 26, 1988·54 cites·18 claims
- 0278US5819532ADynamic load signal fluid controller with instant on flow amplificationEATON CORP·Filed 1997·Granted Oct 13, 1998·46 cites·4 claims
- 0374US4958493AOpen-center steering control unit with flow amplificationEATON CORP·Filed 1989·Granted Sep 25, 1990·29 cites·16 claims
- 0467US6068460ATwo speed gerotor motor with pressurized recirculationEATON CORP·Filed 1998·Granted May 30, 2000·23 cites·9 claims
- 0561US4781219AFluid controller and dampening fluid pathEATON CORP·Filed 1987·Granted Nov 1, 1988·20 cites·25 claims
- 0660US4862690ASteering control unit with both flow amplification and manual steering capabilityEATON CORP·Filed 1988·Granted Sep 5, 1989·19 cites·10 claims
- 0753US2025064224A1Adjustable Firmness Mattress SystemHaarstad Innovative Systems LLC·Filed 2024·Application pending·0 cites
- 0851US5638864ASteering control unit with flow amplification for unequal area cylinderEATON CORP·Filed 1995·Granted Jun 17, 1997·19 cites·5 claims
- 0947USRE34746EOpen-center steering control unit with flow amplificationEATON CORP·Filed 1992·Granted Oct 4, 1994·12 cites·16 claims
- 1043US12256845B2Adjustable firmness mattress systemHaarstad Innovative Systems LLC·Filed 2022·Granted Mar 25, 2025·0 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →