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:
May. 16, 1995
Filed:
Feb. 18, 1994
John A Malvaso, Victor, NY (US);
Pasquale L Amodio, Fairport, NY (US);
Detection Systems, Inc., Fairport, NY (US);
Abstract
A personal security system includes signaling transmitters and receivers for detecting the transmitted signals. The receivers provide an output representing the received signal strength, which is used in combination with the position of the receiver for locating the point of transmission. All of the transmitters are substantially identical, at least in their transmission characteristics and transmitted signal strength, but include a first portable set of transmitters intended to be carried by subscribers, and a second fixed set of transmitters associated with the receivers. The fixed transmitters are actuated one after another and the receivers are polled to record received signal strength after each transmission from each receiver. The results permit comparisons with expected values, between receivers and over time.