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:
Jul. 30, 1996
Filed:
Oct. 11, 1994
Dean C Duhame, Roseville, MI (US);
Daniel V Meyvis, Bloomfield Hills, MI (US);
Stanley Home Automation, Novi, MI (US);
Abstract
The present invention provides a security system for controlling access of persons through a controlled portal. The portal, such as a door, has a lock mechanism for securing the door. A presence detector senses the presence of an object within an approach zone located substantially adjacent the portal. When an object is detected, a fixed transceiver automatically transmits an interrogation signal into the approach zone. A portable transceiver is carried by the person seeking access to the portal. The portable transceiver responds to the interrogation signal by transmitting a response signal. Each portable transceiver or group of transceivers has a unique identification code which is included in the response signal. The fixed transceiver receives the response signal and determines whether the response signal contains a valid access code. If a valid access code is received, the portal is unlocked and other devices may be activated.