Granted Patent
Utility
US 5,706,341 · App. 08/366,668
Active digit cancelling parallel dialer
Inventors:
John R. Zabel, James E. Neil
Patented Case
View Patent ↗
Granted: Jan 6, 1998
Filed: Dec 30, 1994
Inventors
John R. Zabel
James E. Neil
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.