Granted Patent
Utility
US 4,642,675 · App. 06/599,760
Superheterodyne receiver
Inventor:
Gerhard-Gunter Gassmann
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Apr 13, 1984
Inventor
Gerhard-Gunter Gassmann
Assignee (at issue)
ITT Industries
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.