1
Richard A Comroe, Kenneth J Zdunek: Trunked communication system with nationwide roaming capability. Motorola, Thomas G Berry, May 23, 1989: US04833701 (315 worldwide citation)

Selected regional trunking systems are equipped with telephone interconnect capability and provided with local computers (106), which communicate with a national hub computer (110). At each selected trunking system, several IDs are reserved as "roaming IDs" to be temporarily assigned to roaming subs ...


2
Larry C Puhl, Richard A Comroe, Robert W Furtaw, Tracey L Cantarutti: Portable authentification system. Motorola, Jon P Christensen, July 14, 1992: US05131038 (275 worldwide citation)

A personal identity authentification system is provided in which parametric data of an authorized possessor is encrypted into a memory of a portable transceiver device. The portable transceiver device, carried by a possessor, may be activated by an identity request transmitted from a nearby, authori ...


3
Richard A Comroe, Arun Sobti, Robert W Furtaw: Trunking system communication resource reuse method. Motorola, Joseph P Krause, August 13, 1991: US05040238 (173 worldwide citation)

Reusing radio frequency specta in a trunked radio system by establishing small cell trunked radio systems within a large cell trunked radio system wherein low power radio transmission occurs permits multiple small cell trunked radio systems in geographically separate locatiosn to use a limited numbe ...


4
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 (152 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 ...


5
Richard A Comroe, Robert W Furtaw: TDM hand-off technique using time differences. Motorola, Wayne J Egan, November 9, 1993: US05260943 (141 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 ...


6
Robert L Geiger, Kenneth J Crisler, Michael J Crowley, Richard A Comroe: Method for transmitting multiple-protocol packetized data. Motorola, James A Coffing, Val Jean F Hillman, November 16, 1999: US05987022 (132 worldwide citation)

A data communication system employs a method (400) for transmitting packetized data (100) using a combination of well known transmission techniques, such as TCP/IP and a novel compression process. A message type identifier (300) for the packet to be transmitted is first identified, which identifier ...


7
Anthony P Van den Heuvel, Richard A Comroe, Arun Sobti, Anthony J Sarli Jr: Bulletin board resource for communication system access. Motorola, Steven G Parmelee, Susan L Lukasik, April 5, 1994: US05301359 (117 worldwide citation)

A bulletin board communication resource provides a message to communication units regarding available communication systems in a particular geographic area. The bulletin board resource also supports registration of the communication unit with one or more of these systems as selected by the communica ...


8
Richard A Comroe, Gary W Grube: Method for inter operation of a cellular communication system and a trunking communication system. Motorola, Timothy W Markison, January 12, 1993: US05179721 (103 worldwide citation)

In a geographic region that contains a trunking communication system and a cellular communication system, where the coverage area of each system substantially overlaps, a method that enables a communication unit to operate in either system is disclosed. Normally in accordance with the present invent ...


9
James A McDonald, Richard A Comroe, Arun Sobti, Paul M Bocci, Robert W Furtaw, Bradley M Hiben: On-site system frequency sharing with trunking systems using spread spectrum. Motorola, Jon P Christensen, March 9, 1993: US05193101 (92 worldwide citation)

A way of allowing small, low-power communication units to reuse trunked system communication resources within the service coverage area of the larger trunked system without experiencing significant interference from the trunked system. The low power units (requestors and targets) avoid interference ...


10
Richard A Comroe, Gary W Grube: Method for locating a communication unit within a multi mode communication system. Motorola, Timothy W Markison, Steven G Parmelee, June 8, 1993: US05218716 (88 worldwide citation)

In a geographic region that contains a trunking communication system and a cellular communication system, wherein the coverage area of the trunking system and cellular communication system substantially overlap and wherein some communication units are located within the geographic region, a method i ...