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:
Dec. 29, 1992
Filed:
Apr. 19, 1990
Applicant:
Inventor:
Yoshitaka Takasaki, Tokorozawa, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
359118 ; 359125 ; 370 16 ;
Abstract
The present invention relates to an optical subscriber network transmission system which comprises a first optical transmission line whiich transmits information from a center to a subscriber, a second optical transmission line which transmits information from the subscriber to the center, and an auxiliary optical transmission line which is laid between the center and the subscriber.
Takasaki, Yoshitaka. (1992). Optical subscriber network transmission system (U.S. Patent No. 5175639). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5175639
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile