An apparatus, system and method that assesses the number and location of persons in a building. The invention may include none, one, two or more emitters, at least one sensor that senses reflected radiation indicative of a modification to the emitted radiation from multiple ones of the at least two emitters,...http://www.google.es/patents/US7859418?utm_source=gb-gplus-sharePatente US7859418 - Apparatus, system and method for sensing to locate persons in a building in the event of a disaster
Apparatus, system and method for sensing to locate persons in a building in ...
