Granted Patent
Utility
US 6,823,073 · App. 09/764,060
Directional microphone assembly
Inventor:
Dion Ivo de Roo
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Jan 19, 2001
Inventor
Dion Ivo de Roo
Assignee (at issue)
SonionMicrotronic Nederland B.V.
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.