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. 29, 2011
Filed:
Feb. 02, 2008
Peter Levin, Newtonville, MA (US);
David S. DE Lorenzo, Palo Alto, CA (US);
Per K. Enge, Mountain View, CA (US);
Sherman C. Lo, San Mateo, CA (US);
Peter Levin, Newtonville, MA (US);
David S. De Lorenzo, Palo Alto, CA (US);
Per K. Enge, Mountain View, CA (US);
Sherman C. Lo, San Mateo, CA (US);
Zanio, Inc., Newtonville, MA (US);
Abstract
A receiver that receives a plurality of signals that are modulated with a common carrier, where each signal of said signals originates at a different source and experiences a transit delay and Doppler frequency shift before reaching the receiver, and where the transit delay and Doppler frequency shift are related to position and movement of each of the respective sources. The receiver includes means, such as a directional antenna, to ensure that the received signals are bona fide, or at least not subject to the same bogus signal or signals to which a second receiver may be subjected.