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:
Apr. 28, 2009
Filed:
Oct. 16, 2006
Shigeru Shoji, Tokyo, JP;
Tsuneo Kuwahara, Tokyo, JP;
Shigeru Shoji, Tokyo, JP;
Tsuneo Kuwahara, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
An acceleration sensor includes a housing member, first and second magnetic field generation members with weights, a spring member with a fulcrum attached to the housing member, and first and second magnetic field detection sensors attached to the housing member to face the first and second magnetic field generation members with weights, respectively. The first and second magnetic field detection sensors have two pairs of multi-layered magnetoresistive effect elements. A magnetization fixed layer is magnetically fixed along a direction parallel to a direction of displacement of the first and second magnetic field generation members with weights.