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:
Nov. 26, 2002
Filed:
Apr. 05, 1996
Enrique E. Calistro, Cooper City, FL (US);
Robert S. Flippo, Deerfield Beach, FL (US);
Troy A. Bailey, Lake Worth, FL (US);
Motorola, Inc., Schaumberg, IL (US);
Abstract
In a communication system ( ) having transmitters ( ) for transmitting location information to subscriber units ( ) located with the transmitters' coverage areas, a method of determining the location of a subscriber unit. At least some of the transmitters use different assigned time intervals to transmit their information, and a subscriber unit receiving such information can determine its location based, at least in part, on the time interval during which it received information. Received location information is stored in a dedicated portion ( ) of a subscriber unit's memory for later retrieval by the user. In a two-way system, a subscriber unit can transmit its stored location information to a system receiver ( ) for storage in a system memory ( ). The system memory ( ) is accessed by a system operator or other authorized person to determine the location of a subscriber unit and/or its pattern of movement throughout the coverage areas.