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. 19, 1980
Filed:
Jun. 27, 1978
Jan Haisma, Eindhoven, NL;
Klaas L Van Mierloo, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A device for storing digital information in the form of magnetic domains including at least two ferrimagnetic layers on a substrate. The ferrimagnetic layers are separated by a compensation wall and in the presence of a bias magnetic field single magnetic domains and superposed magnetic domain pairs, the superposed domains being separated by a compensation wall, are generated. All single and superposed domains are mutually repulsive. The domains within a superposed pair are attracted to each other. The generated domains are propagated to a shift register and when the reigster is filled a row of domains is coincidentally propagated, transversely out of the register, to a domain array region adjacent the register. Rows are then propagated through the array region to a second shift register where they are individually detected and annihilated. A control device assures the proper working relationship between all elements.