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:
Nov. 26, 2002
Filed:
Jul. 31, 1998
Raymond L. Sobel, Oceanside, CA (US);
Farid Khadem, San Diego, CA (US);
Jerry Piekos, Ramona, CA (US);
The Chamberlain Group, Inc., Elmhurst, IL (US);
Abstract
A universal remote control radio frequency transmitter for use with garage door operators, gate operators and other barrier movement operators is programmable through the use of external switches. The same switches are used after programming for causing the transmitter to transmit an RF signal at about the selected frequency and with a code corresponding to the programmed code. A plurality of RF frequencies are generated by a single RF circuit and a single loop antenna. The selected frequency is determined by digital controller logic and PIN diode shorting in and out selected reactive elements in the RF circuit.