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:
Jun. 21, 1988
Filed:
Dec. 23, 1986
Applicant:
Inventor:
Frederick G Grise, Osterville, MA (US);
Assignee:
Flexwatt Corporation, Canton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B / ;
U.S. Cl.
CPC ...
219543 ; 219345 ; 219548 ; 219552 ; 338306 ; 338314 ;
Abstract
An electrical heating device comprises a substrate, a pair of parallel, spaced apart elongated conductors extending longitudinally of the substrate, and a semi-conductor pattern carried on the substrate and electrically connected to and extending between the conductors. The semi-conductor pattern produces a thermal image for an infrared target. In some embodiments, the thermal image is irregular or circular in shape and the semi-conductor pattern includes a plurality of transversely-spaced bars having relatively wide portions outside, and relatively thin portions within, the area producing the thermal image.