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. 03, 2007
Filed:
Oct. 26, 2004
Gregory J. Buchwald, Crystal Lake, IL (US);
Lawrence M. Ecklund, Wheaton, IL (US);
Richard S. Rachwalski, Lemont, IL (US);
S. David Silk, Barrington, IL (US);
Stephen L. Kuffner, Algonquin, IL (US);
Gregory J. Buchwald, Crystal Lake, IL (US);
Lawrence M. Ecklund, Wheaton, IL (US);
Richard S. Rachwalski, Lemont, IL (US);
S. David Silk, Barrington, IL (US);
Stephen L. Kuffner, Algonquin, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
The presence of the non-television transmission within a channel is used to indicate that secondary non-licensed usage of the channel is permitted. Specifically, if secondary users incorporate the means to identify the unique modulation signature of the secondary user, decoding of a beacon signal may not be necessary. With the above in mind, a radio will be prevented from transmitting within a frequency band when no transmission within the licensed spectrum is currently taking place; the licensee is currently transmitting on the spectrum (e.g., television transmissions are taking place utilizing the spectrum, or the radio cannot sense the presence of a data channel (beacon).