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:
Mar. 02, 1993
Filed:
Dec. 14, 1987
Applicant:
Inventors:
Katsuyuki Imoto, Sayama, JP;
Hiroyuki Kunugiyama, Hitachi, JP;
Assignee:
Hitachi Cable Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385 24 ; 385 15 ;
Abstract
An optical star coupler comprises an optical fiber bundle consisting of a plurality of optical fibers. The central portion of the optical fiber bundle is twisted, fused and pulled under heating so as to form a tapered region, and the outer peripheral portion of the tapered region is coated with a dielectric substance.