Inventor
ROBERTS MATTHEW J
US6 patents
Patents
6 patentsUS5878147AMar 2, 1999
Directional microphone assembly
ETYMOTIC RES INC132 citations98
US6285771B1Sep 4, 2001
Directional microphone assembly
ETYMOTIC RES INC46 citations95
US6134334AOct 17, 2000
Directional microphone assembly
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US6075869AJun 13, 2000
Directional microphone assembly
ETYMOTIC RES INC76 citations95
US6831987B2Dec 14, 2004
Directional microphone assembly
ETYMOTIC RES INC19 citations92
US6567526B1May 20, 2003
Directional microphone assembly
ETYMOTIC RES INC14 citations92