The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 04, 2000
Filed:
Oct. 01, 1998
Applicant:
Inventors:
Troy J Littlefield, Colorado Springs, CO (US);
Dan Fleming, Colorado Springs, CO (US);
Assignee:
Toko, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F / ;
U.S. Cl.
CPC ...
323222 ; 323283 ; 323288 ;
Abstract
An EL lamp driver employs constant power regulation rather than pulse frequency modulation to thereby eliminate the high voltage resistive divider network present in prior art EL lamp drivers that employ pulse frequency modulation.