Individual holder
EKHOFF DONALD L
US·16 granted patents·3 pending applications·282 citations·filing 1985–2017
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
19 records- 0193US10293443B1Precision pneumatic drilling spindle and methodEKHOFF DONALD L·Filed 2017·Granted May 21, 2019·9 cites·18 claims
- 0293US5056082AApparatus for clamping removable disksEKHOFF DONALD L·Filed 1989·Granted Oct 8, 1991·54 cites·23 claims
- 0390US5048005ASpindle clamp having a unitary lock memberEKHOFF DONALD L·Filed 1989·Granted Sep 10, 1991·45 cites·20 claims
- 0488US4755981ASpindle clamp for removable disksEKHOFF DONALD L·Filed 1987·Granted Jul 5, 1988·54 cites·10 claims
- 0585US8553518B1Disc spindle with internal particulate removalEKHOFF DONALD L·Filed 2012·Granted Oct 8, 2013·7 cites·16 claims
- 0679US4736475AAbrading machine for disk shaped surfacesEKHOFF DONALD L·Filed 1987·Granted Apr 12, 1988·26 cites·19 claims
- 0773US5018029AShock start for memory disk motor drivesEKHOFF DONALD L·Filed 1989·Granted May 21, 1991·18 cites·7 claims
- 0872US4862302AAir bladder apparatus for positioning a magnetic headEKHOFF DONALD L·Filed 1988·Granted Aug 29, 1989·18 cites·18 claims
- 0969US8074239B2Axial force spindle clampEKHOFF DONALD L·Filed 2009·Granted Dec 6, 2011·1 cites·18 claims
- 1068US4671018ARigid disk finishing apparatusEKHOFF DONALD L·Filed 1985·Granted Jun 9, 1987·18 cites·24 claims
- 1165US4941293AFlexible rocking mount with forward pivot for polishing padEKHOFF DONALD L·Filed 1989·Granted Jul 17, 1990·20 cites·10 claims
- 1259US9156139B1Disc spindle with flexible cap clampingEKHOFF DONALD L·Filed 2012·Granted Oct 13, 2015·1 cites·19 claims
- 1355US2010108054A1Optically efficient and thermally protected solar heating apparatus and methodEKHOFF DONALD L·Filed 2008·Application pending·0 cites
- 1443US2013107396A1Vacuum clearing of spindle particulatesEKHOFF DONALD L·Filed 2012·Application pending·0 cites
- 1543US2011045718A1Marine propulsion system and methodEKHOFF DONALD L·Filed 2009·Application pending·0 cites
- 1641US9884671B2Marine propulsion system and methodEKHOFF DONALD L·Filed 2012·Granted Feb 6, 2018·0 cites·20 claims
- 1737US4891722AIncremental stepping assembly for a rotary actuatorEKHOFF DONALD L·Filed 1988·Granted Jan 2, 1990·3 cites·17 claims
- 1835US5148982AAdjustable slit nozzleEKHOFF DONALD L·Filed 1991·Granted Sep 22, 1992·8 cites·17 claims
- 1930US5327312ARotary actuator having cantilevered rotational axisEKHOFF DONALD L·Filed 1993·Granted Jul 5, 1994·0 cites·17 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →