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:
Jun. 25, 2019
Filed:
May. 03, 2017
Applicant:
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Inventors:
Masakazu Kishi, Kawasaki, JP;
Hajime Kubota, Kawasaki, JP;
Masayuki Itoh, Kawasaki, JP;
Yoshinori Mesaki, Yokohama, JP;
Assignee:
FUJITSU LIMITED, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03B 5/32 (2006.01); H03B 5/36 (2006.01); H03L 5/00 (2006.01); H03G 3/20 (2006.01); H03G 3/30 (2006.01);
U.S. Cl.
CPC ...
H03G 3/20 (2013.01); H03B 5/32 (2013.01); H03B 5/364 (2013.01); H03L 5/00 (2013.01); H03B 2200/0018 (2013.01); H03B 2200/0046 (2013.01); H03G 3/30 (2013.01);
Abstract
A crystal oscillator device is disclosed. The crystal oscillator device includes a casing; a crystal piece; a pair of excitation electrodes; a transmission antenna electrically coupled to one of the excitation electrodes; a reception antenna configured to receive a radio wave from the transmission antenna; and an alarm generator configured to generate an alarm based on a signal whose amplitude is equal to or less than a reference value, the signal being received by the reception antenna.