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:
Mar. 03, 2009
Filed:
Feb. 23, 2006
Paul W. Mcburney, San Francisco, CA (US);
William J. Morrison, San Francisco, CA (US);
Justin A. Vandegrift, San Francisco, CA (US);
Kenneth U. Victa, San Francisco, CA (US);
Paul W. McBurney, San Francisco, CA (US);
William J. Morrison, San Francisco, CA (US);
Justin A. Vandegrift, San Francisco, CA (US);
Kenneth U. Victa, San Francisco, CA (US);
eRide, Inc., San Francisco, CA (US);
Abstract
A roving extended range high sensitivity satellite positioning system receiver provides position fixes in adverse signal conditions as low as minus 150 dbm and with as few as three satellites by measuring the bit phase of the navData message and the codephase, and finding a simultaneous solution. Previous position fixes that were obtained in the vicinity by earlier rovers are deposited in an indexed database for consultation. A cellular phone system can be used to simply communicate the current identity codes and their database entries.