Inventor
SCHWENDEMAN ROBERT J
US47 patents
Patents
47 patentsUS5546411AAug 13, 1996
Method and apparatus for adaptively selecting a communication strategy in a selective call radio communication system
MOTOROLA INC162 citations99
US5396537AMar 7, 1995
Reliable message delivery system
MOTOROLA INC204 citations99
US5301354AApr 5, 1994
Satellite based global paging system
MOTOROLA INC152 citations99
US5315635AMay 24, 1994
Reliable message communication system
MOTOROLA INC193 citations98
US4914649AApr 3, 1990
Multiple frequency message system
MOTOROLA INC125 citations98
US6035207AMar 7, 2000
System and method for allocating frequency channels in a two-way messaging network
MOTOROLA INC59 citations96
US5903842AMay 11, 1999
System and method for allocating frequency channels in a two-way messaging network
MOTOROLA INC55 citations96
US5852780ADec 22, 1998
System and method for allocating frequency channels in a two-way messaging network
MOTOROLA INC60 citations96
US5446922AAug 29, 1995
Method and apparatus for switched diversity reception of a radio signal
MOTOROLA INC61 citations96
US5416473AMay 16, 1995
Calendar driven selective call messaging system and operating method
MOTOROLA INC214 citations96
US5404569AApr 4, 1995
Satellite based acknowledge-back paging system
MOTOROLA INC47 citations96
US5325403AJun 28, 1994
Method and apparatus for dual-channel diversity reception of a radio signal
MOTOROLA INC82 citations96
US5325088AJun 28, 1994
Synchronous selective signalling system
MOTOROLA INC84 citations96
US5239306AAug 24, 1993
Dual mode receiver having battery saving capability
MOTOROLA INC87 citations96
US5206855AApr 27, 1993
Multiple frequency message system
MOTOROLA INC106 citations96
US5047763ASep 10, 1991
Selective call system with message rebroadcasting over another selective call system
MOTOROLA INC110 citations96
US5010317AApr 23, 1991
Satellite based simulcast paging system
MOTOROLA INC113 citations96
US4951039AAug 21, 1990
Animated data display interleaving
MOTOROLA INC111 citations96
US5168493ADec 1, 1992
Time division multiplexed selective call system
MOTOROLA INC57 citations95
US5555183ASep 10, 1996
Method and apparatus for synchronizing to a synchronous selective call signal
MOTOROLA INC40 citations93
US5491469AFeb 13, 1996
Communication system for temporarily directing radio receivers to a second radio frequency
MOTOROLA INC54 citations93
US5440299AAug 8, 1995
Method and apparatus for equalizing battery life in a selective call communication system
MOTOROLA INC22 citations93
US5371899ADec 6, 1994
Communication system capable of reassigning radio receivers
MOTOROLA INC29 citations93
US5289178AFeb 22, 1994
Sensitivity indicator for a radio receiver and method therefor
MOTOROLA INC23 citations93
US5282205AJan 25, 1994
Data communication terminal providing variable length message carry-on and method therefor
MOTOROLA INC34 citations93
US5274840ADec 28, 1993
Satellite communication system
MOTOROLA INC35 citations93
US5257019AOct 26, 1993
Satellite selective call signalling system
MOTOROLA INC48 citations93
US5239670AAug 24, 1993
Satellite based global paging system
MOTOROLA INC39 citations93
US4972439ANov 20, 1990
Active signalling transmitter control
MOTOROLA INC24 citations93
US6073094AJun 6, 2000
Voice compression by phoneme recognition and communication of phoneme indexes and voice features
MOTOROLA INC32 citations92
US5737691AApr 7, 1998
System and method for allocating frequency channels in a two-way messaging network
MOTOROLA INC33 citations92
US5617083AApr 1, 1997
Data communication receiver having variable length message carry-on
MOTOROLA INC23 citations92
US5600312AFeb 4, 1997
Messaging system and method having roaming capability and controlled group messaging
MOTOROLA INC43 citations92
US5450071ASep 12, 1995
Method and apparatus for addressing a single message to multiple addresses
MOTOROLA INC46 citations92
US5128665AJul 7, 1992
Selective call signalling system
MOTOROLA INC47 citations92
US5392451AFeb 21, 1995
Satellite based acknowledge-back paging system
MOTOROLA INC46 citations91
US5371737ADec 6, 1994
Selective call receiver for receiving a multiphase multiplexed signal
MOTOROLA INC20 citations91
US6052443AApr 18, 2000
Alphanumeric message composing method using telephone keypad
MOTOROLA INC14 citations74
US5905945AMay 18, 1999
Method and apparatus for improving the reliability of communicating a message from a portable subscriber unit to a base receiver in a two-way radio messaging system
MOTOROLA INC14 citations74
US5551061AAug 27, 1996
Apparatus and method in a radio communication system for distinguishing an identifier of a nearby transmitter from that of a more distant transmitter
MOTOROLA INC10 citations74
US5423057AJun 6, 1995
Method and apparatus for sharing signaling formats in a communication channel
MOTOROLA INC11 citations74
US5414419AMay 9, 1995
Battery saving method for selective call receivers
MOTOROLA INC9 citations74
US5410417AApr 25, 1995
Method and apparatus for correcting an angle of an optical image for improving the efficiency of facsimile encoding of the image
MOTOROLA INC16 citations74
US5051993ASep 24, 1991
Mixed modulation level communication system
MOTOROLA INC13 citations74
US6137867AOct 24, 2000
Alphanumeric message composing method using telephone keypad
MOTOROLA INC11 citations72
US5974121AOct 26, 1999
Alphanumeric message composing method using telephone keypad
MOTOROLA INC10 citations72
USD304577SNov 14, 1989
Alphanumeric encoding terminal or similar article
MOTOROLA INC2 citations63