Granted Patent
Utility
US 4,337,461 · App. 06/166,327
Volume control mechanism for a bell assembly
Inventor:
John Carrier
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Jul 7, 1980
Inventor
John Carrier
Assignee (at issue)
Plessey Handel Und Investments AG
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.