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:
Aug. 10, 1993
Filed:
Sep. 04, 1990
Applicant:
Inventors:
Jerry J Conley, Waseca, MN (US);
Gary B Mortensen, Waseca, MN (US);
Assignee:
E. F. Johnson Company, Waseca, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ; H02J / ; G05F / ;
U.S. Cl.
CPC ...
310303 ; 310305 ; 429-5 ; 323906 ;
Abstract
A long-life, electrical energy source having an adjustable output is comprised of a light emitting phosphor activated by a radioisotope and coupled to a plurality of photovoltalic cells that have their outputs electrically connected together. The output power of the electrical energy source is effectively regulated by selectively changing the connections of the outputs of the photovoltaic cells in response to the progression of time.