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. 31, 1989
Filed:
Jan. 16, 1987
Applicant:
Inventors:
Minoru Fujita, Tokyo, JP;
Yoichi Fukushima, Tokyo, JP;
Assignee:
Kyodo Printing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G11B / ;
U.S. Cl.
CPC ...
430270 ; 430321 ; 430322 ; 430323 ; 430324 ; 430495 ; 428201 ; 428203 ; 428913 ; 3461351 ; 369272 ; 369275 ; 369277 ; 369283 ; 369284 ; 369286 ;
Abstract
An improved art of producing an optical recording medium by utilizing a photo-etching technique is disclosed. Pits pattern of address for guide groove and sector on each of tracks of optical recording medium to be preformatted is formed in accordance with a photo-etching process or a resist lift-off process. A film of optical recording medium is formed on a transparent base plate and it is then subjected to photo-etching process or alternatively to resist lift-off process to form preformatted pits pattern.
Fujita, Minoru. (1989). Preformatted optical recording card and method of producing the same (U.S. Patent No. 4877713). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4877713
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile