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:
Dec. 20, 2005
Filed:
Jun. 07, 2000
David Blaker, Holland, MI (US);
Matthew Cardwell, Holland, MI (US);
Paul Duckworth, Elkhart, IN (US);
Brian Honeck, Holland, MI (US);
David Blaker, Holland, MI (US);
Matthew Cardwell, Holland, MI (US);
Paul Duckworth, Elkhart, IN (US);
Brian Honeck, Holland, MI (US);
Johnson Controls Technology Company, Plymouth, MI (US);
Abstract
A trainable transceiver for learning and transmitting an activation signal that includes an RF carrier frequency modulated with a code for remotely actuating a device, such as a garage door opener. The trainable transceiver preferably includes a controller, a signal generator, and a dynamically tunable antenna having a variable impedance that may be selectively controlled in accordance with a detector circuit signal. The detector circuit provides a measurement of the transmission power and is also used to vary the applied transmission power of the transceiver in response to operating and environmental parameters.