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:
Jul. 25, 2000
Filed:
Apr. 13, 1998
Michael D Murphy, Sunnyvale, CA (US);
Trimble Navigation Limited, Sunnyvale, CA (US);
Abstract
An integrated radio direction finding and GPS receiver tracking system. In one embodiment, a transmitter device is attached to an object to be located. The transmitter device transmits a signal. The transmitted signal is received by a portable, user-totable tracking unit. The portable, user-totable tracking unit uses the received signal to determine at least the bearing of the object from the portable, user-totable tracking unit. A position generating system is coupled to the portable, user-totable tracking unit to generate the position information of the portable, user-totable tracking unit. The bearing of the object from the portable, user-totable tracking unit and the position information of the portable, user-totable tracking unit is transmitted from the portable, user-totable tracking unit to a base station. The base station processes the bearing of the transmitter device from the portable, user-totable tracking unit and the position information of the portable, user-totable tracking unit to provide information to be employed during the location of the object.