Granted Patent
Utility
US 4,335,440 · App. 06/105,533
Signal enhancement circuit
Inventor:
Vance B. Gold
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: Dec 20, 1979
Inventor
Vance B. Gold
Assignee (at issue)
American Can Company
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.