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:
Aug. 26, 1997
Filed:
May. 23, 1995
Applicant:
Inventors:
David S Sprague, Portola Valley, CA (US);
Arthur N Woo, Cupertino, CA (US);
Assignee:
Trimble Navigation Limited, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
3644497 ; 364448 ;
Abstract
A network comprises a plurality of GPS navigation receivers with two-way radio data communication for communicating the current computed positions of individual mobile units to other mobile units in the network and to stationary dispatch controllers connected in by the public switched telephone network. Ordinary telephone personal pager service is carried out transparently in the network for non-GPS equipped mobile units.