Inventor · disambiguated record
James H. Spreen
Also filed as: SPREEN JAMES H
12 granted patents·528 citations·filing 1986–2014
93Inventor score
Top patents by PatentIndex Score
12 records- 0196US5225971AThree coil bridge transformerIBM·Filed 1992·Granted Jul 6, 1993·145 cites·12 claims
- 0294US4803609AD. C. to D. C. converterIBM·Filed 1988·Granted Feb 7, 1989·122 cites·6 claims
- 0392US4864486APlank and frame transformerIBM·Filed 1988·Granted Sep 5, 1989·55 cites·12 claims
- 0491US5155676AGapped/ungapped magnetic coreIBM·Filed 1991·Granted Oct 13, 1992·65 cites·11 claims
- 0576US4868732APluggable power system having magnetic flux coupled power transformer and inductive filter componentsIBM·Filed 1987·Granted Sep 19, 1989·23 cites·8 claims
- 0672US5168440ATransformer/rectifier assembly with a figure eight secondary structureIBM·Filed 1991·Granted Dec 1, 1992·24 cites·14 claims
- 0770US5119059ACombined differential and common mode choke for a power supplyIBM·Filed 1990·Granted Jun 2, 1992·40 cites·9 claims
- 0866US4703409ACoupled power supply inductors for reduced ripple currentIBM·Filed 1986·Granted Oct 27, 1987·25 cites·34 claims
- 0962US10090878B2Motor drive system and methodFRANKLIN ELECTRIC CO INC·Filed 2014·Granted Oct 2, 2018·1 cites·22 claims
- 1062US4965712ATransformer having plural-turn coreIBM·Filed 1989·Granted Oct 23, 1990·22 cites·5 claims
- 1139US5245521ASuppression of transformer capacitive currentIBM·Filed 1991·Granted Sep 14, 1993·6 cites·30 claims
- 1233US9054625B2Variable speed drive systemSPREEN JAMES H·Filed 2011·Granted Jun 9, 2015·0 cites·19 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →