Granted Patent
Utility
US 4,638,504 · App. 06/749,814
Independent channel modulation system for AM stereo
Inventor:
Stanley Salek
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Jun 28, 1985
Inventor
Stanley Salek
Assignee (at issue)
Broadcast Electronics, 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.