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:
Oct. 23, 2001
Filed:
Feb. 24, 1999
Applicant:
Inventor:
James C. Green, Los Altos, CA (US);
Assignee:
Trimble Navigation Limited, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 7/185 ; G01S 5/02 ;
U.S. Cl.
CPC ...
H04B 7/185 ; G01S 5/02 ;
Abstract
A method and apparatus for coupling data from an external data device to a position determination device. An Auxiliary Data Transmission Unit (ADTU) that includes a radio transmitter couples to the external data device. The ADTU receives serial data from the external data device and encodes the received serial data into a format suitable for receipt by the position determination device. The encoded data is then modulated to produce a radio signal that is transmitted to the position determination device in a scheme that permits multiple devices to communicate with the position determination device without interference.