Granted Patent
Utility
US 4,644,561 · App. 06/713,923
Modem for RF subscriber telephone system
Inventors:
Eric Paneth, David N. Critchlow, Moshe Yehushua
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Mar 20, 1985
Inventors
Eric Paneth
David N. Critchlow
Moshe Yehushua
Assignee (at issue)
International Mobile Machines Corporation
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.