Granted Patent
Utility
US 4,424,421 · App. 06/314,212
Apparatus for testing subscriber carrier systems
Inventors:
Todd V. Townsend, Thomas Streenan
Patented Case
View Patent ↗
Granted: Jan 3, 1984
Filed: Oct 23, 1981
Inventors
Todd V. Townsend
Thomas Streenan
Assignee (at issue)
Lynch Communications Systems, 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.