Granted Patent
Utility
US 4,408,172 · App. 06/309,666
Variable speed tuning selector
Inventor:
Terry A. Perdue
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Oct 8, 1981
Inventor
Terry A. Perdue
Assignee (at issue)
Heath Consultants Incorporated
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.