Granted Patent
Utility
US 4,878,232 · App. 06/919,036
Data transmission system
Inventor:
David Fisher
Patented Case
View Patent ↗
Granted: Oct 31, 1989
Filed: Oct 15, 1986
Inventor
David Fisher
Assignee (at issue)
STC PLC
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.