Granted Patent
Utility
US 6,801,629 · App. 09/745,753
Protective hearing devices with multi-band automatic amplitude control and active noise attenuation
Inventors:
Owen D. Brimhall, Craig M. Collotzi, Gregory N. Koskowich
Patented Case
View Patent ↗
Granted: Oct 5, 2004
Filed: Dec 22, 2000
Inventors
Owen D. Brimhall
Craig M. Collotzi
Gregory N. Koskowich
Assignee (at issue)
SONIC INNOVATIONS, 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.