Granted Patent
Utility
US 5,633,909 · App. 08/413,464
Apparatus and method for generating calls and testing telephone equipment
Inventor:
Todd M. Fitch
Patented Case
View Patent ↗
Granted: May 27, 1997
Filed: Mar 28, 1995
Inventor
Todd M. Fitch
Assignee (at issue)
Centigram Communications 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.