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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.:

US 4809256 B1

PDFFull Text
Date of Patent:
Feb. 28, 1989

Filed:

Dec. 11, 1986

Optical demultiplexer

Applicant:
Inventors:

David R Smith, Woodbridge, GB;

Raymond C Hooper, Ipswich; both of, GB;

Assignee:

British Telecommunications public limited company, , GB;

Attorney:

Nixon & Vanderhye

Primary Examiner:

Robert L Griffin

Assistant Examiner:

Leslie Van Beek

Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
370-4 ; 350 9613 ; 370-1 ;

Find Patent Forward Citations

Smith, David. (1989). Optical demultiplexer (U.S. Patent No. 4809256). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4809256

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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