Granted Patent
Utility
US 4,408,553 · App. 06/221,177
Low torque direct dialing pattern selection mechanism
Inventors:
John Mihovch, John Cain Blackwood
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Dec 29, 1980
Inventors
John Mihovch
John Cain Blackwood
Assignee (at issue)
The Singer Company Limited
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.