Granted Patent
Utility
US 4,347,628 · App. 06/201,440
Rotary tuning mechanism
Inventor:
Walter F. Speer
Patented Case
View Patent ↗
Granted: Aug 31, 1982
Filed: Oct 28, 1980
Inventor
Walter F. Speer
Assignee (at issue)
RCA 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.