Granted Patent
Utility
US 5,040,237 · App. 07/448,004
Method and apparatus for an alternate home channel for a land mobile transmission trunked communication system
Inventors:
Keith Barnes, Donald R. Bauman, Philip A. Keefer
Patented Case
View Patent ↗
Granted: Aug 13, 1991
Filed: Dec 8, 1989
Inventors
Keith Barnes
Donald R. Bauman
Philip A. Keefer
Assignee (at issue)
E.F. Johnson Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.