Granted Patent
Utility
US 5,680,447 · App. 08/457,664
Circuit and method for responding to third party calls in a telephone system having call waiting
Inventors:
Robert L. Diamond, Steven L. Landry, Kamran Khojasteh
Patented Case
View Patent ↗
Granted: Oct 21, 1997
Filed: May 31, 1995
Inventors
Robert L. Diamond
Steven L. Landry
Kamran Khojasteh
Assignee (at issue)
Cidco Incorporated
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.