Granted Patent
Utility
US 4,536,622 · App. 06/426,359
Remote telephone on-hook, off-hook control and indication circuit
Inventor:
Richard F. Rieman
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Sep 29, 1982
Inventor
Richard F. Rieman
Assignee (at issue)
AT&T Technologies Incorporated
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.