Granted Patent
Utility
US 4,914,397 · App. 07/227,017
Digital frequency converter
Inventors:
Simon Gale, Stephen M. Moroz
Patented Case
View Patent ↗
Granted: Apr 3, 1990
Filed: Aug 1, 1988
Inventors
Simon Gale
Stephen M. Moroz
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.