Granted Patent
Utility
US 4,850,039 · App. 06/879,936
Transistor mixer
Inventor:
Max Ward Muterspaugh
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Jun 30, 1986
Inventor
Max Ward Muterspaugh
Assignee (at issue)
RCA Licensing 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.