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:
Oct. 25, 1983
Filed:
Jun. 06, 1980
Applicant:
Inventors:
Seiji Yonezawa, Hachiouji, JP;
Toshio Sugiyama, Toyokawa, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
350446 ; 369118 ; 369122 ; 372 43 ;
Abstract
An optical system characterized in that a plano-convex lens for guiding onto a disk a light beam emitted from a semiconductor laser, and a prism for deriving reflected light from the disk are unitarily formed.
Yonezawa, Seiji. (1983). Optical system for reproducing information (U.S. Patent No. 4411500). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4411500
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile