Inventor · disambiguated record
Philip A. Keefer
Also filed as: KEEFER PHILIP A
7 granted patents·286 citations·filing 1989–1996
90Inventor score
Technology areasH04W
Files withJOHNSON CO E F7
Top patents by PatentIndex Score
7 records- 0178US5815799APriority system for a wide area transmission trunked communication systemJOHNSON CO E F·Filed 1996·Granted Sep 29, 1998·58 cites·16 claims
- 0270US5548802AMethod and apparatus for a remote network switch for a land mobile transmission trunked communication systemJOHNSON CO E F·Filed 1995·Granted Aug 20, 1996·42 cites·16 claims
- 0368US5613196AMethod and apparatus for a distributive wide area network for a land mobile transmission trunked communication systemJOHNSON CO E F·Filed 1994·Granted Mar 18, 1997·47 cites·9 claims
- 0460US5465386ASignaling protocol for a distributive wide area transmission trunked communication systemJOHNSON CO E F·Filed 1994·Granted Nov 7, 1995·36 cites·5 claims
- 0558US5159701AMethod and apparatus for a distributive wide area network for a land mobile transmission trunked communication systemJOHNSON CO E F·Filed 1991·Granted Oct 27, 1992·32 cites·15 claims
- 0657US5440759AModular networking switch system for a distributive wide area transmission trunked communication systemJOHNSON CO E F·Filed 1994·Granted Aug 8, 1995·31 cites·8 claims
- 0750US5040237AMethod and apparatus for an alternate home channel for a land mobile transmission trunked communication systemJOHNSON CO E F·Filed 1989·Granted Aug 13, 1991·40 cites·10 claims
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