% Expired Patents = 100.0

Trademarks = 1

Forward Citations = 21

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4 inventors (with patents filed for the assignee):

Earl F Crandall (5 out of 6 patents)

Robert C Smallwood, Sr (3 out of 3 patents)

Ray J King (2 out of 8 patents)

4. Robert G Crandall (1 out of 1 patent)

5 patents: Sort by Forward Citations

1. 7514879 - Method and system for driving a plasma-based light source (2009-04-07),

2. 7514878 - High frequency electronic ballast with sine wave oscillator (2009-04-07),

3. 7388334 - High frequency electronic ballast with sine wave oscillator (2008-06-17),

4. 7252406 - Fluorescent lamp system using reflectors (2007-08-07),

5. 7235932 - High efficiency ballast for gas discharge lamps (2007-06-26),

Company Overview

Purespectrum, Inc. is a leading provider of survey sampling solutions for market research firms. We offer high-quality, authentic panel data to help businesses make informed decisions. Our advanced technology and strict quality control measures ensure accurate and reliable results for our clients. With a global reach and a commitment to excellence, Purespectrum is the preferred choice for survey sampling services.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

5 Patents

#14 in Savannah, GA

#993 in Georgia

#51,620 in US

Savannah, GA, United States of America

Purespectrum, Inc.

Forward Citations = 21

4 inventors:

Earl F Crandall (5 out of 6 patents)

Robert C Smallwood, Sr (3 out of 3 patents)

Ray J King (2 out of 8 patents)

4. Robert G Crandall (1 out of 1 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Purespectrum, Inc.. Retrieved from https://idiyas.com/company/purespectrum

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]