Inventor
MATZEN NORMAN P
US7 patents
⚠️ This page may combine multiple inventors who share the name “MATZEN NORMAN P”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ETYMOTIC RES INC
5 patentsUS6694034B2Feb 17, 2004
Transmission detection and switch system for hearing improvement applications
ETYMOTIC RES INC194 citations98
US5131046AJul 14, 1992
High fidelity hearing aid amplifier
ETYMOTIC RES INC56 citations95
US7460677B1Dec 2, 2008
Directional microphone array system
ETYMOTIC RES INC19 citations89
US7764801B2Jul 27, 2010
Directional microphone array system
ETYMOTIC RES INC9 citations81
US5696833ADec 9, 1997
Hearing aid having externally controlled amplifier gain and method of using same
ETYMOTIC RES INC12 citations72