1
Allan F Hurst, David J Harrison, John D Wittams: Mobile radio transmission system using preferred home service area. U S Philips Corporation, David R Treacy, January 4, 1994: US05276905 (229 worldwide citation)

A private mobile radio transmission system comprising a plurality of geographically spaced base stations (BS) defining a plurality of overlapping service areas (SA). The base stations are coupled for example by land-line communication links (CL) to a system controller (SC). Mobile stations (MS) equi ...


2
Indur B Mandhyan, Karen I Trovato: Traffic monitoring system with reduced communications requirements. Philips Electronics North America Corporation, David R Treacy, July 23, 1996: US05539645 (202 worldwide citation)

Monitoring of traffic on selected routes requires little communication time, through reporting only instances of abnormal speed. During a calibration phase calibrant vehicles are operated along the selected routes with sufficient frequency and for enough days to provide meaningful data. Each calibra ...


3
Gerardus C P Lokhoff, Y F Dehery, G Stoll, G Theile: Subband coded digital transmission system using some composite signals. U S Philips Corporation, David R Treacy, February 25, 1997: US05606618 (197 worldwide citation)

Reproduction accuracy of, for example a digital stereo audio signal, is improved by transmitting sample data as sub-signals such as frequency subband signals. In one or more subbands, corresponding components such as left and right stereo channels are combined so that only one composite signal is tr ...


4
Gerardus C P Lokhoff, Yves Francois Dehery, Gerhard J Stoll, Gunther Theile: Subband coded digital transmission system using some composite signals. U S Philips Corporation, David R Treacy, July 23, 1996: US05539829 (174 worldwide citation)

Reproduction accuracy of, for example a digital stereo audio signal, is improved by transmitting sample data as sub-signals such as frequency subband signals. In one or more subbands, corresponding components such as left and right stereo channels are combined so that only one composite signal is tr ...


5
Christopher J Collier, Robert J Murray: Transmission system for sending two signals simultaneously on the same communications channel. U S Philips Corporation, David R Treacy, December 17, 1991: US05073899 (173 worldwide citation)

A transmission system in which a suitably modulated speech or data signal is combined with a low bit rate (100b/s) spread spectrum signal and transmitted simultaneously on the same channel with the modulated speech lying within the bandwidth of the spread spectrum signal.


6
Thomas E Jednacz, Yongping Xia, Srinagesh Satyanarayana: Lighting control system with packet hopping communication. Philips Electronics North America Corporation, Anne E Barschall, David R Treacy, March 10, 1998: US05726644 (156 worldwide citation)

Building lights are master controlled to reduce power consumption under building master control, or in response to electric utility commands to the building computer. Each lighting wall control unit includes a transceiver which can communicate to at least one neighbor transceiver, thereby forming a ...


7
Robert J G MacNamee, Sunil K Vadgama: Protocol and transceiver for cordless/cellular telephone service. U S Philips Corporation, David R Treacy, May 18, 1993: US05212684 (154 worldwide citation)

A communications system suitable for use with hand portable radio telephones operating in a cellular mode, the typical cell size being between 500 m and 3 km radius. Each cell comprising at least one primary or base station (10) connected to the PSTN and one or more secondary portable stations (14) ...


8
Gerardus C P Lokhoff, Yves Francois Dehery, Gerhard J Stoll: Digital sub-band transmission system with transmission of an additional signal. U S Philips Corporation, David R Treacy, June 25, 1996: US05530655 (149 worldwide citation)

A transmission channel may be utilized for a combination of wide-band signals and auxiliary signals, while still providing improved reproduction accuracy. Digital sub-signals or subband signals representing at least first and second data-reduced components are combined with at least one auxiliary di ...


9
Geoffrey R Selby: Mobile radio transmission system. U S Philips Corporation, David R Treacy, October 24, 1989: US04876738 (141 worldwide citation)

A mobile radio tarnsmission system comprises a plurality of base stations (BS) with corresponding service areas (SA) which together cover a geographical area through which mobile stations (M) can roam. Each base station is connected to a central station (CS) by means of a respective two-way communic ...


10
Reinhard Schulein, Ernst Bratenstein: Apparatus for recording and quickly retrieving video signal parts on a magnetic tape. U S Philips Corporation, David R Treacy, January 29, 1991: US04989104 (132 worldwide citation)

In an apparatus for recording and quickly retrieving video signal parts on a magnetic tape, during recording information about the local position of each video signal part is automatically stored in a memory associated with the apparatus, which is designed for storing identifying information for a l ...