Granted Patent
Utility
US 4,446,339 · App. 06/371,808
Rotary dial decoder
Inventor:
Duane R. Bolgiano
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Apr 26, 1982
Inventor
Duane R. Bolgiano
Assignee (at issue)
International Mobile Machines 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.