1
Sewim F Ablay, Stuart W Thro, Kenneth J Zdunek: Subscriber unit for a trunked voice/data communication system. Motorola, Thomas G Berry, Wayne J Egan, June 6, 1989: US04837858 (157 worldwide citation)

A trunked voice/data subscriber is provided that operates in either a voice mode, or one of three data modes. In a first data mode, the voice/data subscriber monitors the voice control channel to enable rapid participation in a voice call. In a second data mode, the subscriber monitors an assigned d ...


2
Kenneth J Zdunek, Garry C Hess, Richard A Comroe: Method for dynamically allocating data channels on a trunked communication system. Motorola, Wayne J Egan, Thomas G Berry, September 26, 1989: US04870408 (150 worldwide citation)

Disclosed is a method to dynamically allocate a number of data channels on a trunked radio system (100). The data activity is monitored during a predetermined time interval. If activity is above a predetermined maximum, an additional channel may be reserved for data use. Conversely, if data traffic ...


3
Richard A Comroe, Robert W Furtaw: TDM hand-off technique using time differences. Motorola, Wayne J Egan, November 9, 1993: US05260943 (139 worldwide citation)

A subscriber makes its hand-off decision based on time difference measurements between synchronization markers received from adjacent repeaters relative to the synchronization markers received from the subscriber's assigned repeater. The subscriber uses signal quality measurements to identify candid ...


4
Paul H Gailus, William J Turney, Francis R Yester Jr: Method and arrangement for a sigma delta converter for bandpass signals. Motorola, Wayne J Egan, Ronald G Wesoloski, August 15, 1989: US04857928 (137 worldwide citation)

An improved apparatus and method for a sigma delta converter for bandpass signals is disclosed, suitable for use in mobile radio applications, between the front end and digital signal processing stages, that includes at least one bandpass filter, an n-level quantizer, an n-level digital-to-analog (D ...


5
Francis R Yester Jr, William J Turney, Paul H Gailus: Low power digital receiver. Motorola, Wayne J Egan, Thomas G Berry, March 20, 1990: US04910752 (133 worldwide citation)

A low power digital receiver (10) is provided that contemporaneously selects the lowest possible sampling signal frequency (34) (from a plurality of available sampling signals), and received signal level (28) to properly digitize (32) and recover a desired signal. Digitization is performed after the ...


6
Joel A Kubby, Jingkuang Chen, Feixia Pan: Micro-electro-mechanical fluid ejector and method of operating same. Xerox Corporation, Wayne J Egan, March 19, 2002: US06357865 (104 worldwide citation)

A micro-electromechanical fluid ejector that is easily fabricated in a standard polysilicon surface micromachining process is disclosed, which can be batch fabricated at low cost using existing external foundry capabilities. In addition, the surface micromachining process has proven to be compatible ...


7
Paul M Bocci, Alan L Wilson, Walter F Anderson: Layered session data unit frame. Motorola, Wayne J Egan, September 15, 1992: US05148482 (89 worldwide citation)

A layered session data unit frame (300) is provided wherein a first frame (200), designated a session data unit("SDU"), containing user information (209), a link control field (205) and an encryption field (207), is divided into a plurality of smaller frames (321, 323), each having an information fi ...


8
Timothy W Aldridge, Dean Y Hodge, Harold G Voce: Line powered DCA including dual programmed microcontrollers. Universal Data Systems, Wayne J Egan, June 29, 1993: US05224154 (77 worldwide citation)

A line powered data communication apparatus (DCA) includes dual programmed microcontrollers, one being interfaceable with data terminal equipment and the other for governing the operation of modem circuitry of the DCA which is interfaceable to a telephone line of a telephone network. The dual progra ...


9
Brett A Jackson, Paul A Kuemmel, Naresh J Bhatia, Vitaly Lenchik, Paul J Cizek: Reporting unit. Motorola, Wayne J Egan, August 25, 1992: US05142694 (71 worldwide citation)

A RF reporting system is provided that effectively increases the coverage or serving area from an associated base station site. According to the invention, an RF communication system is arranged with a multiplicity of levels designated 0-n. The RF system has at least one base site designated as leve ...


10
George R Scott, John C Gray, Eric M Scott: Hydroelectrically powered, remotely controlled irrigation system. Motorola, Thomas G Berry, Wayne J Egan, June 13, 1989: US04838310 (70 worldwide citation)

An impeller is positioned within the flow of a fluid to be used to irrigate an area. The impeller drives a generator, which operates to charge and sustain a storage battery. The battery powers a receiver having an identification code by which the receiver may be addressed to receive commands, such a ...



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