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. 22, 1996
Filed:
May. 20, 1993
Richard J Joyce, Thousand Oaks, CA (US);
Allan R Kramer, Simi Valley, CA (US);
Hughes Aircraft Company, Los Angeles, CA (US);
Abstract
Apparatus and method for detecting unauthorized disturbance of a protected surface, includes a substrate adapted to conformably encase and adhere to the surface that is to be protected. A plurality of layers, each comprising a plurality of frangible conduits is embedded in the substrate and randomly overlays a majority of the protected surface. Each of the conduits has its ends protruding from the substrate to permit a monitor to be coupled thereto for monitoring the integrity of the continuity of each conduits, and for switching from a first state to a second state whenever the continuity of any of the conduits is broken. A warning alarm is coupled to the monitor for displaying the state of the monitor.