Individual holder
BARTHOLD FRED O
US·7 granted patents·1 pending application·130 citations·filing 1976–2015
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
8 records- 0192US4734839ASource volt-ampere/load volt-ampere differential converterBARTHOLD FRED O·Filed 1987·Granted Mar 29, 1988·112 cites·32 claims
- 0283US9251945B2Planar core with high magnetic volume utilizationBARTHOLD FRED O·Filed 2014·Granted Feb 2, 2016·7 cites·18 claims
- 0361US7812577B2Sepic fed buck converterBARTHOLD FRED O·Filed 2008·Granted Oct 12, 2010·5 cites·23 claims
- 0454US7777458B2DC-DC converterBARTHOLD FRED O·Filed 2008·Granted Aug 17, 2010·3 cites·25 claims
- 0552US9111678B2Planar core-type uniform external field equalizer and fabricationBARTHOLD FRED O·Filed 2014·Granted Aug 18, 2015·0 cites·18 claims
- 0646US9438099B2Harmonic displacement reductionBARTHOLD FRED O·Filed 2014·Granted Sep 6, 2016·0 cites·17 claims
- 0740US2016111209A1Planar core with high magnetic volume utilizationBARTHOLD FRED O·Filed 2015·Application pending·0 cites
- 0837US4042844APower transistor switchBARTHOLD FRED O·Filed 1976·Granted Aug 16, 1977·3 cites·5 claims
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