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:
Apr. 20, 1999
Filed:
Jul. 22, 1997
Applicant:
Inventor:
Jeffrey A Rosenwald, Frederick, MD (US);
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
315 56 ; 315 62 ; 315194 ;
Abstract
A non-saturating inductor is connected in series with the filament of an incandescent lamp and the increase in resistance of the filament with respect to the increase in temperature is utilized to dynamically modulate the power factor of the circuit during a warm-up interval immediately following lamp turn-on.