Granted Patent
Utility
US 6,415,020 · App. 09/311,779
Call on-hold improvements
Inventors:
Deborah L. Pinard, Edward N. Bijman, Helen St. Amour
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: May 13, 1999
Inventors
Deborah L. Pinard
Edward N. Bijman
Helen St. Amour
Assignee (at issue)
Mitel 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.