Granted Patent
Utility
US 4,412,352 · App. 06/371,477
Frequency conversion circuit
Inventor:
Harald Schuster
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Apr 23, 1982
Inventor
Harald Schuster
Assignee (at issue)
Licentia Patent-Verwaltungs-GmbH
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.