Granted Patent
Utility
US 6,799,018 · App. 10/039,405
Wireless transmission communication system and portable microphone unit
Inventor:
Keith Lam
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Jan 3, 2002
Inventor
Keith Lam
Assignee (at issue)
Phonic Ear 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.