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. 21, 2001
Filed:
Oct. 12, 1999
Applicant:
Inventors:
Langtao Lui, Singapore, SG;
Wamadeva Balachandran, Uxbridge, GB;
Assignee:
Brunel University, , GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S 5/14 ; H04Q 7/38 ;
U.S. Cl.
CPC ...
G01S 5/14 ; H04Q 7/38 ;
Abstract
A navigation system, used for example to navigate visually handicapped people, uses a satellite system such as the GPS system to locate the user via a user held receiver (,). A two-way communication system such as a digital telephone (,) communicates with a central service center (,) at which the user's exact location and navigational information can be determined. There is preferably provided a human-to-human information interface (,). The use of a two-way communication system (,) enables some of the components (,) to be kept at a remote and stationary base station (,).