Granted Patent
Utility
US 5,809,421 · App. 08/587,601
Method for locating variable control channels by a mobile station in a radiotelephone system
Inventors:
Keith Manssen, Robert K. Krolopp
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Jan 2, 1996
Inventors
Keith Manssen
Robert K. Krolopp
Assignee (at issue)
Motorola, Inc.
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.