Inventor
MIZUMA HIROAKI
JP3 patents
Patents
3 patentsUS7852734B2Dec 14, 2010
Recording and playback apparatus and optical head
SONY CORP0 citations50
US7230903B2Jun 12, 2007
Recording and playback apparatus and optical head including a variable optical coupling efficiency device
SONY CORP1 citations50
US7231646B2Jun 12, 2007
Disk-drive device
SONY CORP0 citations38