Granted Patent
Utility
US 6,798,874 · App. 10/123,945
System and method for enabling custom telephone features on a PBX system
Inventors:
George F. Ohlinger, Gary R. Hoffman, Joel Donelson
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Apr 16, 2002
Inventors
George F. Ohlinger
Gary R. Hoffman
Joel Donelson
Assignee (at issue)
Inter-Tel, 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.