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:
Jan. 27, 2015
Filed:
Oct. 09, 2009
Applicant:
Manabu Dohi, Gillingham, GB;
Inventor:
Manabu Dohi, Gillingham, GB;
Assignee:
Hochiki Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B 17/00 (2006.01); G08B 29/18 (2006.01); G01N 21/53 (2006.01); G08B 17/107 (2006.01);
U.S. Cl.
CPC ...
G01N 21/53 (2013.01); G08B 29/18 (2013.01); G08B 17/107 (2013.01);
Abstract
This smoke detector is provided with: a plurality of light emitting devices which emit light beams of mutually different wavelengths; and a plurality of scattered light receiving sections which receive, at a different scattering angle for each light beam of the respective wavelengths, scattered light generated due to the plurality of light beams emitted simultaneously from these light emitting devices impinging on smoke.