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. 04, 1977
Filed:
Mar. 15, 1976
Willem Frederik Druyvesteyn, Eindhoven, NL;
Harm Marinus Booij, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A magnetic device comprising at least one thin layer of a magnetizable material having a preferred direction of magnetization which is approximately perpendicular to the surface of the layer in which magnetic domains are generated, maintained and possibly annihilated in the layer. A domain guiding structure which with a given magnetic field substantially in the preferred direction enables the occurrence of two types of magnetic domains. The area of the largest domain is at least 15% and at most 125% larger than that of the other domains. The device also has means which convert one type of domain into the other type of domain.