Inventor · disambiguated record
John P. Ekstrand
Also filed as: EKSTRAND JOHN · EKSTRAND JOHN P · EKSTRAND JOHN PHILIP · EKSTRAND JOHN PHILLIP
13 granted patents·2 pending applications·536 citations·filing 1975–2004
94Inventor score
Top patents by PatentIndex Score
15 records- 0197US4000397ASignal processor method and apparatusSPECTRA PHYSICS·Filed 1975·Granted Dec 28, 1976·156 cites·15 claims
- 0287US4988942ASwitched resistor regulator control when transfer function includes discontinuitySPECTRA PHYSICS·Filed 1988·Granted Jan 29, 1991·57 cites·47 claims
- 0386US4953176AAngular optical cavity alignment adjustment utilizing variable distribution coolingSPECTRA PHYSICS·Filed 1989·Granted Aug 28, 1990·37 cites·21 claims
- 0476US5055743AInduction heated cathodeSPECTRA PHYSICS·Filed 1989·Granted Oct 8, 1991·33 cites·17 claims
- 0576US4668906ASwitched resistor regulatorEKSTRAND JOHN P·Filed 1985·Granted May 26, 1987·39 cites·23 claims
- 0671US4814966AShunt switched resistor regulator with diode snubberSPECTRA PHYSICS·Filed 1987·Granted Mar 21, 1989·25 cites·15 claims
- 0770US4982078ABeam position sensor with time shared normalizing circuitSPECTRA PHYSICS·Filed 1989·Granted Jan 1, 1991·20 cites·15 claims
- 0869US4719404ASwitched resistor regulator with linear dissipative regulatorSPECTRA PHYSICS·Filed 1986·Granted Jan 12, 1988·27 cites·20 claims
- 0965US4816741ASwitched resistor regulator with diode-snubber for parasitic inductance in switched resistorSPECTRA PHYSICS·Filed 1987·Granted Mar 28, 1989·17 cites·15 claims
- 1058US5300750AThermal induction heaterMETCAL INC·Filed 1991·Granted Apr 5, 1994·84 cites·18 claims
- 1157US5048032AAir cooled RF induction excited ion laserSPECTRA PHYSICS·Filed 1990·Granted Sep 10, 1991·17 cites·24 claims
- 1252US5047609ACrossed dot bar graph display for indication of position of a light beam, and an improved laser system with active laser cavity alignment using sameSPECTRA PHYSICS·Filed 1990·Granted Sep 10, 1991·14 cites·13 claims
- 1350US4947102AFeedback loop gain compensation for a switched resistor regulatorSPECTRA PHYSICS·Filed 1988·Granted Aug 7, 1990·10 cites·15 claims
- 1439US2005078730A1Optimizing power for second laserFiled 2004·Application pending·0 cites
- 1538US2004001523A1Optimizing power for second laserFiled 2002·Application pending·0 cites
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