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:
Mar. 28, 1995
Filed:
Dec. 19, 1991
Applicant:
Inventors:
Toshiyuki Yoshimura, Kokubunji, JP;
Shigeru Kakumoto, Kodaira, JP;
Shinji Okazaki, Urawa, JP;
Yuji Toda, Hachiouji, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ; G11C / ;
U.S. Cl.
CPC ...
3692751 ; 369101 ; 3692753 ; 365118 ;
Abstract
A high density storage medium which stores predetermined information by matching it on one-to-one basis with multiple levels of depth or height formed in predetermined plural areas of substrate surface, a storing method, a reading method and various systems using them have been disclosed.