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Inventor

CRANDALL EARL F

US7 patents
⚠️ This page may combine multiple inventors who share the name “CRANDALL EARL F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

PURESPECTRUM INC

4 patents
US7235932B2Jun 26, 2007

High efficiency ballast for gas discharge lamps

PURESPECTRUM INC18 citations81
US7514878B2Apr 7, 2009

High frequency electronic ballast with sine wave oscillator

PURESPECTRUM INC12 citations78
US7388334B2Jun 17, 2008

High frequency electronic ballast with sine wave oscillator

PURESPECTRUM INC15 citations75
US7514879B2Apr 7, 2009

Method and system for driving a plasma-based light source

PURESPECTRUM INC0 citations49

DIGITAL EQUIPMENT CORP

1 patent
US4808773AFeb 28, 1989

Low impedance cable

DIGITAL EQUIPMENT CORP15 citations71

PURESPECTRUM LLC

1 patent
US7252406B2Aug 7, 2007

Fluorescent lamp system using reflectors

PURESPECTRUM LLC9 citations66

TRANSWORLD LIGHTING INC

1 patent
US6975069B2Dec 13, 2005

Multi-phase gas discharge lamps

TRANSWORLD LIGHTING INC3 citations54