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:
Dec. 08, 1998
Filed:
Nov. 13, 1997
Glenn C Steiner, Los Altos, CA (US);
Lloyd H Banta, Palo Alto, CA (US);
Trimble Navigation Limited, Sunnyvale, CA (US);
Abstract
A Global Positioning System (GPS) receiving apparatus that is powered by a control or data interface signal from a computing apparatus. The GPS receiving apparatus includes a GPS receiver for receiving GPS satellite signals and providing GPS-derived location information and a converter for converting the interface signal to operating power signal for operating the GPS receiver. Optionally, the GPS receiver includes a power controller for controlling a duty cycle of the operating power in the GPS receiver in order to not exceed the power available from the interface signal. The interface signal is transmitted according to an interface standard such as RS232, RS422, or PC parallel.