Granted Patent
Utility
US 6,741,713 · App. 09/213,468
Directional hearing device
Inventors:
M. M. Boone, I. L. D. M. Merks, A. Z. van Halteren
Patented Case
View Patent ↗
Granted: May 25, 2004
Filed: Dec 17, 1998
Inventors
M. M. Boone
I. L. D. M. Merks
A. Z. van Halteren
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.