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:
Sep. 28, 2004
Filed:
Feb. 25, 2002
Applicant:
Inventors:
Jacques Lewiner, Saint-Cloud, FR;
Eric Carreel, Meudon, FR;
Assignee:
Inventel, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04B 1/104 ;
U.S. Cl.
CPC ...
H04B 1/104 ;
Abstract
The invention concerns a local combined telephone and an alarm system comprising a central base communicating through two-way radio channel, according to a multiple access communication protocol, with telephone stations and detectors adapted to detect an emergency situation. The base transmits at regular intervals of less than 10 minutes, scanning messages addressed to the detectors and determines whether the detectors are operating, depending on whether it receives clearance messages from the detectors.