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:
May. 24, 2011
Filed:
Nov. 01, 2006
Applicants:
Michihiko Hayashi, Fukui, JP;
Masakazu Hatanaka, Fukui, JP;
Inventors:
Michihiko Hayashi, Fukui, JP;
Masakazu Hatanaka, Fukui, JP;
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P 9/04 (2006.01); G01C 19/56 (2006.01);
U.S. Cl.
CPC ...
Abstract
An angular velocity sensor has a stable characteristic in which a vibration element has a small variation in the driving efficiency even when carbon dioxide gas is generated by the reaction with oxygen gas in a package including therein the vibration element. To realize this, the angular velocity sensor has a mixed gas of inert gas and oxygen gas in the package so that the mixed gas in the package has a pressure higher than the atmospheric pressure.