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:
Dec. 04, 2018
Filed:
Nov. 05, 2015
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Eiichi Fujii, Shiojiri, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 33/26 (2006.01); F17C 3/00 (2006.01);
U.S. Cl.
CPC ...
G01R 33/26 (2013.01); F17C 3/00 (2013.01);
Abstract
A magnetism measuring device includes: a gas cell which includes a cell portion that has a main chamber, a reservoir, a communication hole which allows the main chamber and the reservoir to communicate with each other, and an opening provided in the reservoir, a sealing portion which seals the opening, an ampoule disposed in the reservoir, and an alkali metal gas which fills the main chamber and the reservoir. The ampoule is disposed at a predetermined position in the reservoir, and the opening is provided at a position that is distant from the predetermined position.