An apparatus for remote inspection of fire extinguishers at one or a system of fire extinguisher stations includes, e.g., at each fire extinguisher station: a detector for lack of presence of a fire extinguisher in its installed position at the fire extinguisher station; a detector for out-of-range pressure...http://www.google.fr/patents/US6488099?utm_source=gb-gplus-shareBrevet US6488099 - Remote fire extinguisher station inspection
