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:
Jan. 25, 1977
Filed:
May. 15, 1975
Jerry P Graham, Fairfax, VA (US);
Sound Technology, Inc., Enfield, CT (US);
Abstract
Coded messages, for use in the remote control of equipment for example, are transmitted and received in a manner in which substantially precludes unauthorized or accidental activation of a control associated with the receiving means. This secure communication is accomplished by generation of a plurality of carrier frequencies in a predetermined sequence and by the modulation of each carrier frequency in accordance with a digital code. The receiving means, which is initially tuned to receive the first carrier in a transmission sequence, detects and decodes the received signals and stores the decoded message whereby equipment to be controlled may be responsive to the entire received message; the receiver being retuned to another carrier after each bit of a coded message is detected.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile