Inventor
TOMIYAMA HIROYUKI
JP5 patents
⚠️ This page may combine multiple inventors who share the name “TOMIYAMA HIROYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PIONEER CORP
4 patentsUS6814181B2Nov 9, 2004
Electrically conductive damper device for speaker
PIONEER CORP5 citations61
US6772855B2Aug 10, 2004
Damper for speaker and method of producing the same
PIONEER CORP2 citations61
US7308750B2Dec 18, 2007
Method of manufacturing a magnesium diaphragm
PIONEER CORP4 citations57
US7454032B2Nov 18, 2008
Magnesium diaphragm, method of manufacturing the same, and speaker apparatus
PIONEER CORP0 citations51