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:
Aug. 22, 1989
Filed:
Apr. 15, 1987
Marvin Isaacman, Los Angeles, CA (US);
Linear Corporation, Carlsbad, CA (US);
Abstract
An electrically programmable security system includes a receiver responsive to particular radio frequency signals which include a predetermined digital code encoded on the radio frequency signal. The receiver generates a control signal upon detecting the presence of the encoded radio frequency signal. The receiver also includes a circuit for digitally communicating the predetermined digital code on a communication link. A transmitter includes a memory for storing a digital code and a circuit for generating a radio frequency signal at the radio frequency to which said receiver is responsive. The radio frequency signal generated by the transmitter is encoded with the digital code stored in the memory. The transmitter further includes a circuit for coupling with the communication link and a circuit for inputting the predetermined digital code from the receiver unit communicated on the communication link into the memory when the communication link is coupled to the coupling circuit.