Granted Patent
Utility
US 6,830,876 · App. 10/705,082
Acoustic resistor for hearing improvement and audiometric applications, and method of making same
Inventors:
Mead C. Killion, Andrew J. Haapapuro
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Nov 10, 2003
Inventors
Mead C. Killion
Andrew J. Haapapuro
Assignee (at issue)
ETYMOTIC RESEARCH, 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.