Inventor
KEEFER PHILIP A
US7 patents
Patents
7 patentsUS5815799ASep 29, 1998
Priority system for a wide area transmission trunked communication system
JOHNSON CO E F58 citations95
US5613196AMar 18, 1997
Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system
JOHNSON CO E F47 citations95
US5548802AAug 20, 1996
Method and apparatus for a remote network switch for a land mobile transmission trunked communication system
JOHNSON CO E F42 citations95
US5465386ANov 7, 1995
Signaling protocol for a distributive wide area transmission trunked communication system
JOHNSON CO E F36 citations95
US5440759AAug 8, 1995
Modular networking switch system for a distributive wide area transmission trunked communication system
JOHNSON CO E F31 citations95
US5159701AOct 27, 1992
Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system
JOHNSON CO E F32 citations95
US5040237AAug 13, 1991
Method and apparatus for an alternate home channel for a land mobile transmission trunked communication system
JOHNSON CO E F40 citations92