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:
Aug. 08, 1989
Filed:
Oct. 23, 1987
Applicant:
Inventors:
Yasushi Tomioka, Kokubunji, JP;
Shuji Imazeki, Kodaira, JP;
Motoyasu Terao, Tokyo, JP;
Masahiro Ojima, Tokyo, JP;
Yoshio Taniguchi, Hino, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365119 ;
Abstract
A desired portion of information stored in the form of holes using hole burning phenomena is erased by irradiating a desired portion of a recording medium with light so as to erase desired holes. In this way it is possible to erase selectively only desired information among information stored in a PHB memory and further to rewrite information in the portion, where information has been erased.
Tomioka, Yasushi. (1989). Method for erasing recording in a phb memory (U.S. Patent No. 4855951). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4855951
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile