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. 14, 2006
Filed:
Jun. 25, 2003
Seiji Oda, Saitama, JP;
Mitoshi Umeki, Saitama, JP;
Hiroshi Uehara, Saitama, JP;
Keisuke Hirano, Saitama, JP;
Seiji Oda, Saitama, JP;
Mitoshi Umeki, Saitama, JP;
Hiroshi Uehara, Saitama, JP;
Keisuke Hirano, Saitama, JP;
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Abstract
A crystal unit has a crystal blank having a hole defined in at least one principal surface thereof, the crystal blank having a region of a reduced thickness including the hole, the region serving as a vibrating region, excitation electrodes disposed respectively on opposite principal surfaces of the crystal blank in the vibrating region, extension electrodes extending respectively from the excitation electrodes to respective opposite ends of one side of the crystal blank, and a casing having a step formed therein. The opposite ends of the one side of the crystal blank are fixed to the step by a joining member. The crystal blank has a notched portion defined therein between the one side and the vibrating region, the notched portion extending from at least one transverse edge of the crystal blank in a transverse direction of the crystal blank.