| Patent Number |
Title Of Patent |
Date Issued |
| 6907252 |
Method and apparatus for detecting the presence of mobile terminals |
June 14, 2005 |
| A method and apparatus for detecting the presence of mobile terminals such as cell phones that are in the vicinity of one or more selected locations. The detected devices are identified and such information may then be provided to an application for its use. Specifically, a detector is |
| 6791466 |
Apparatus for providing wireless transmission of information in electronic display systems and m |
September 14, 2004 |
| An apparatus for providing wireless transmission of information in electronic display systems and methods of using the same. In particular, the present invention is directed to an air interface and protocol to facilitate wireless transmission of information from a communication base |
| 6381464 |
Mobile location estimation in a wireless system using designated time intervals of suspended com |
April 30, 2002 |
| Methods and apparatus for estimating mobile location in a wireless communication system including a plurality of base stations. In a base-to-mobile embodiment, the system base stations periodically transmit location signals to mobile stations during a system-wide blank-and-burst inte |
| 6256475 |
Telecommunications-assisted satellite positioning system |
July 3, 2001 |
| A wireless terminal and auxiliary system are disclosed that enable the wireless terminal to determine its location based on signals transmitted from navigation satellites. In particular, the tasks of signal acquisition and signal processing required of a wireless terminal in the prior ar |
| 6021330 |
Mobile location estimation in a wireless system using designated time intervals of suspended com |
February 1, 2000 |
| Methods and apparatus for estimating mobile location in a wireless communication system including a plurality of base stations. In a base-to-mobile embodiment, the system base stations periodically transmit location signals to mobile stations during a system-wide blank-and-burst inte |
| 5873025 |
Modulated backscatter wireless communication system having an extended range |
February 16, 1999 |
| A modulated backscatter communication system (e.g., an Electronic Shelf Label (ESL) system) includes a central node (e.g., a ceiling node) and one or more remote nodes (e.g., ESL tags). The central node transmits a downlink radio signal which is reflectively modulated at a remote node to |
| 5689238 |
Object locator system and methods therefor |
November 18, 1997 |
| Methods and systems for locating objects are disclosed. An electronic tag is attached to an object before storing the object. The electronic tag is identifiable by a unique response code. The response code and information pertaining to the object are recorded and the object may then be s |
| 5649296 |
Full duplex modulated backscatter system |
July 15, 1997 |
| A duplex radio communication system includes an Interrogator which generates a first modulated signal by modulating a first information signal onto a radio carrier signal. The Interrogator transmits the first modulated signal to at least one remote Tag of the system. The remote Tag r |
| 5513184 |
Wireless communication system |
April 30, 1996 |
| The present invention overcomes the prior art limitations by dividing a coverage area into very small regions or cells. The inventive system can be built as an adjunct to a wired telecommunication system such as a PBX. Advantageously, because of the relatively small size of each cell, |
| 5459727 |
Wireless telecommunication system |
October 17, 1995 |
| The present invention overcomes the prior art limitations by dividing a coverage area into very small regions or cells. The inventive system can be built as an adjunct to a wired telecommunication system such as a PBX. Advantageously, because of the relatively small size of each cell, |
| 5150377 |
Direct sequence spread spectrum (DSSS) communications system with frequency modulation utilized |
September 22, 1992 |
| Hardware complexity of transmitting and receiving equipment in a CDMA (Code Division Multple Access) cellular radio transmission system, embodying the principles of the invention, is reduced by the use of frequency modulation (FM) techniques to achieve spectral spreading in combination w |
| 4703474 |
Spread spectrum code-division-multiple-access (SS-CDMA) lightwave communication system |
October 27, 1987 |
| The present invention relates to a lightwave communication system, and associated transmitters (13) and receivers (14), which uses both spread spectrum, code-division-multiple-access (SS-CDMA), and wavelength-division-multiplexing (WDM) techniques for 2-way transmissions over a light |
