Granted Patent
Utility
US 6,438,240 · App. 08/802,001
Circuit to improve transducer separation in handsfree telephone
Inventor:
Rob McLeod
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Feb 18, 1997
Inventor
Rob McLeod
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.