Granted Patent
Utility
US 4,446,554 · App. 06/316,377
Arrangement for multiple custom calling
Inventor:
Robert C. Webber
Patented Case
View Patent ↗
Granted: May 1, 1984
Filed: Oct 29, 1981
Inventor
Robert C. Webber
Assignee (at issue)
GTE Automatic Electric Labs Inc.
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.