Granted Patent
Utility
US 4,697,281 · App. 06/839,564
Cellular telephone data communication system and method
Inventor:
Harry M. O'Sullivan
Patented Case
View Patent ↗
Granted: Sep 29, 1987
Filed: Mar 14, 1986
Inventor
Harry M. O'Sullivan
Assignee (at issue)
Spectrum Cellular Communications Corporation, 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.