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. 09, 1976
Filed:
Jun. 27, 1972
Applicant:
Inventors:
Shigeru Yoshizawa, Kodaira, JA;
Nobuo Saito, Mitaka, JA;
Itsuo Mikami, Kodaira, JA;
Gen-ichi Kamoshita, Koganei, JA;
Assignee:
Hitachi, Ltd., , JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
3401 / ; 3401 / ;
Abstract
A bubble domain driving apparatus is provided in which a large memory device with a storage capacity of 256 megabits, for example, is divided into 64 smaller memory elements, each thereof comprising one or plurality of thin magnetic film strips for bubble domain, and each of the 4-megabit smaller memory elements is provided with its own coils for applying in the plane thereof bubble domain driving rotating fields with the coils adapted to be selectively energized.