Granted Patent
Utility
US 4,436,964 · App. 06/302,179
Hookswitch mechanism for telephone instrument
Inventor:
Steve W. Haskins
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Sep 14, 1981
Inventor
Steve W. Haskins
Assignee (at issue)
International Telephone and Telegraph 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.