Granted Patent
Utility
US 6,654,461 · App. 09/395,633
Synthesized telephone line ring signal impedance termination
Inventors:
Spiro Poulis, John Evans
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Sep 14, 1999
Inventors
Spiro Poulis
John Evans
Assignee (at issue)
3Com 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.