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:
Oct. 01, 1985
Filed:
Sep. 23, 1982
Applicant:
Inventor:
Takao Fujisawa, Omiya, JP;
Assignee:
Nittan Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340584 ;
Abstract
In the fire alarm system comprising a pair of alarm lines, a plurality of fire detectors connected between said alarm lines and a receiving unit connected at the proximal end of the alarm lines, and generating a fire alarm in response to an alarm signal raised by one or more fire detectors, an improved system in which disconnection of alarm lines and number of fire detectors producing alarm signals can be indicated, is disclosed.
Fujisawa, Takao. (1985). Fire alarm system (U.S. Patent No. 4544921). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4544921
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