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. 11, 1997
Filed:
May. 30, 1995
Applicant:
Inventors:
Charles R Trimble, Los Altos Hills, CA (US);
Arthur N Woo, Cupertino, CA (US);
Assignee:
Trimble Navigation Limited, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; G01S / ;
U.S. Cl.
CPC ...
342357 ;
Abstract
Several fixed-location pseudolites transmit coordinates of their respective positions to a local area navigation receiver. The respective position and range information to each pseudolite are used to compute the position of the receiver. The pseudolites transmit on frequencies exempt from licensing requirements at power levels under one watt and use spread spectrum communication and pseudo random number codes similar to the global positioning system operated by the United States Government.