Inventor
DE ROO DION I
NL7 patents
⚠️ This page may combine multiple inventors who share the name “DE ROO DION I”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONION NEDERLAND BV
5 patentsUS7684575B2Mar 23, 2010
Electret assembly for a microphone having a backplate with improved charge stability
SONION NEDERLAND BV77 citations95
US7286680B2Oct 23, 2007
Cylindrical microphone having an electret assembly in the end cover
SONION NEDERLAND BV101 citations95
US7239714B2Jul 3, 2007
Microphone having a flexible printed circuit board for mounting components
SONION NEDERLAND BV135 citations95
US7136496B2Nov 14, 2006
Electret assembly for a microphone having a backplate with improved charge stability
SONION NEDERLAND BV96 citations95
US7062058B2Jun 13, 2006
Cylindrical microphone having an electret assembly in the end cover
SONION NEDERLAND BV83 citations95