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. 28, 1990
Filed:
Apr. 06, 1989
Lodewijk Van Ruyven, Eindhoven, NL;
U.S. Philips Corp., New York, NY (US);
Abstract
A radiation coupling device comprising at least three radiation guides a first radiation guide of which is divided on at least one end into at least two further radiation guides. According to the invention the radiation guides form part of a semiconductor layer structure having, in a cross-section in the direction of thickness, at least two radiation guiding layers each comprising a further radiation guide. The layers are optically separated by a passive layer which locally shows a strip-shaped reduction in thickness or an interruption where the two radiation guiding layers respectively are present within each other's amplification profile or coincide and thus form the first radiation guide.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile