Granted Patent
Utility
US 4,722,583 · App. 06/813,292
Modulators
Inventor:
William J. Stewart
Patented Case
View Patent ↗
Granted: Feb 2, 1988
Filed: Dec 24, 1985
Inventor
William J. Stewart
Assignee (at issue)
Plessey Overseas Limited
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.