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. 19, 2020
Filed:
Mar. 31, 2016
Applicant:
Nihon Dempa Kogyo Co., Ltd., Tokyo, JP;
Inventors:
Assignee:
NIHON DEMPA KOGYO CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 9/19 (2006.01); H03H 3/02 (2006.01); H03H 9/02 (2006.01);
U.S. Cl.
CPC ...
H03H 9/19 (2013.01); H03H 3/02 (2013.01); H03H 9/02023 (2013.01); H03H 9/02133 (2013.01); H03H 2003/022 (2013.01);
Abstract
An AT-cut crystal element is provided. The AT-cut crystal element includes side surfaces intersecting with a Z'-axis of a crystallographic axis of a crystal. At least one side surface of the side surfaces is constituted of three surfaces of a first surface to a third surface. Besides, a crystal resonator including the AT-cut crystal element, and a crystal unit including the crystal resonator are provided.