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:
Sep. 26, 1989
Filed:
Nov. 21, 1986
Applicant:
Inventor:
David Silverglate, Soquel, CA (US);
Assignee:
Quality Technologies Corporation, Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G02B / ;
U.S. Cl.
CPC ...
350432 ;
Abstract
A substantially solid transparent body focuses light from an LED wholly immersed therein to a point external to the body. The body is composed of a substantially non-heat-conducting plastic material and has a surface with the curvature of a Cartesian Ovoid substantially in accordance with the formula L.sub.o .times.N.sub.o .times.L.sub.i .times.N.sub.i =C, where