Inventor
SAKAMOTO TETSUHIRO
JP29 patents
⚠️ This page may combine multiple inventors who share the name “SAKAMOTO TETSUHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
23 patentsUS6353592B1Mar 5, 2002
Optical recording medium and optical disk device
SONY CORP52 citations96
US7138164B2Nov 21, 2006
Optical recording medium
SONY CORP28 citations92
US6613396B1Sep 2, 2003
Optical disc and method for manufacturing same
SONY CORP18 citations92
US6349086B2Feb 19, 2002
Optical disc and method for manufacturing same
SONY CORP20 citations92
US5726970AMar 10, 1998
Multi-layer optical recording medium
SONY CORP31 citations92
US7790263B2Sep 7, 2010
Ag alloy reflective film for optical information recording medium, optical information recording medium and Ag alloy sputtering target for forming Ag alloy reflective film for optical information recording medium
SONY CORP9 citations84
US7038998B2May 2, 2006
Optical recording disk having land and groove wobbled at outer circumference side
SONY CORP13 citations84
US5448538ASep 5, 1995
Electromagnet coils having a different inductance during magneto-optical recording and reproducing
SONY CORP19 citations82
US6731589B2May 4, 2004
Substrate for optical recording media, optical recording medium, manufacturing process for optical recording media, and optical recording/reproducing method
SONY CORP7 citations74
US8379503B2Feb 19, 2013
Optical information recording reproduction apparatus and optical information recording reproduction method
SONY CORP5 citations73
US6869655B1Mar 22, 2005
Optical recording medium
SONY CORP6 citations73
US6309726B1Oct 30, 2001
Optical recording medium
SONY CORP12 citations73
US9536543B2Jan 3, 2017
Information processing device, storage medium, and method
SONY CORP2 citations71
US6944100B2Sep 13, 2005
Method for reproducing information data from a magneto-optical storage medium in reverse direction with recording
SONY CORP4 citations63
US6751166B2Jun 15, 2004
Phase error detection method for magnetic wall displacement type of magneto-optical recording device
SONY CORP2 citations63
US7843796B2Nov 30, 2010
Optical information recording medium and method of marking BCA (burst cutting area) into the same
SONY CORP5 citations62
US7720766B2May 18, 2010
Digital data selling and buying transaction system, auxiliary digital data selling and buying system, digital data selling and buying transaction method, auxiliary digital data selling and buying method, and digital data selling and buying transaction apparatus
SONY CORP5 citations62
US7060373B2Jun 13, 2006
Magneto-optical recording medium and signal reproduction method
SONY CORP3 citations62
US7423939B2Sep 9, 2008
Method for manufacturing magneto-optical recording medium
SONY CORP1 citations52
US7075881B2Jul 11, 2006
Signal recording/playback apparatus, and recording compensation method and playback method used therefor
SONY CORP0 citations52
US7517436B2Apr 14, 2009
Magneto-optical recording medium and manufacturing method thereof
SONY CORP0 citations41
US7972673B2Jul 5, 2011
Optical recording medium
SONY CORP0 citations40
US7911929B2Mar 22, 2011
Optical disk read only memory
SONY CORP0 citations40
SAKAMOTO TETSUHIRO
6 patentsUS8305870B2Nov 6, 2012
Optical information recording method, optical information reproducing method, optical information recording apparatus, and optical information recording and reproducing apparatus
SAKAMOTO TETSUHIRO0 citations50
US8187689B2May 29, 2012
Optical recording medium having write once metal reflective film
SAKAMOTO TETSUHIRO1 citations50
US8462608B2Jun 11, 2013
Read-only optical recording medium
SAKAMOTO TETSUHIRO0 citations45
US8565057B2Oct 22, 2013
Multilayer optical recording medium
SAKAMOTO TETSUHIRO0 citations40
US8526284B2Sep 3, 2013
Multilayer optical recording medium with interfacial surfaces
SAKAMOTO TETSUHIRO0 citations40
US8634287B2Jan 21, 2014
Method for manufacturing read-only optical disc medium and read-only optical disc medium
SAKAMOTO TETSUHIRO0 citations38