Granted Patent
Utility
US 4,521,736 · App. 06/037,554
Demodulator for pulse width modulated signals
Inventor:
John O. Ryan
Patented Case
View Patent ↗
Granted: Jun 4, 1985
Filed: May 9, 1979
Inventor
John O. Ryan
Assignee (at issue)
Ampex 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.