Granted Patent
Utility
US 4,604,741 · App. 06/611,515
Voice and data interface circuit
Inventor:
John A. Barsellotti
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: May 17, 1984
Inventor
John A. Barsellotti
Assignee (at issue)
Mitel 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.