Inventor · disambiguated record
Earl F. Crandall
Also filed as: CRANDALL EARL F
7 granted patents·3 pending applications·72 citations·filing 1987–2004
84Inventor score
Top patents by PatentIndex Score
10 records- 0173US7235932B2High efficiency ballast for gas discharge lampsPURESPECTRUM INC·Filed 2004·Granted Jun 26, 2007·18 cites·18 claims
- 0266US7388334B2High frequency electronic ballast with sine wave oscillatorPURESPECTRUM INC·Filed 2004·Granted Jun 17, 2008·15 cites·10 claims
- 0366US7252406B2Fluorescent lamp system using reflectorsPURESPECTRUM LLC·Filed 2004·Granted Aug 7, 2007·9 cites·11 claims
- 0465US7514878B2High frequency electronic ballast with sine wave oscillatorPURESPECTRUM INC·Filed 2004·Granted Apr 7, 2009·12 cites·5 claims
- 0555US4808773ALow impedance cableDIGITAL EQUIPMENT CORP·Filed 1987·Granted Feb 28, 1989·15 cites·6 claims
- 0642US6975069B2Multi-phase gas discharge lampsTRANSWORLD LIGHTING INC·Filed 2004·Granted Dec 13, 2005·3 cites·14 claims
- 0740US7514879B2Method and system for driving a plasma-based light sourcePURESPECTRUM INC·Filed 2004·Granted Apr 7, 2009·0 cites·16 claims
- 0833US2005179390A1Compact fluorescent lampTRANSWORLD LIGHTING INC·Filed 2004·Application pending·0 cites
- 0932US2005104501A1High efficiency gas discharge lampsTRANSWORLD LIGHTING INC·Filed 2004·Application pending·0 cites
- 1031US2005106914A1High frequency electronic ballast lamp interconnectsTRANSWORLD LIGHTING INC·Filed 2004·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →