Inventor
ISHIYAMA MASAFUMI
SG24 patents
⚠️ This page may combine multiple inventors who share the name “ISHIYAMA MASAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HOYA CORP
6 patentsUS7736768B2Jun 15, 2010
Magnetic disk and manufacturing method thereof
HOYA CORP69 citations98
US7695833B2Apr 13, 2010
Solid body surface evaluation method, magnetic disk evaluation method, magnetic disk, and manufacturing method thereof
HOYA CORP71 citations98
US7597973B2Oct 6, 2009
Magnetic disk and method of producing the same
HOYA CORP69 citations98
US7537846B2May 26, 2009
Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk
HOYA CORP74 citations97
US9946153B2Apr 17, 2018
Mask blank and transfer mask
HOYA CORP0 citations52
US9470971B2Oct 18, 2016
Mask blank, transfer mask, and methods of manufacturing the same
HOYA CORP0 citations52
HOYA MAGNETICS SINGAPORE PTE
6 patentsUS7722968B2May 25, 2010
Magnetic disk and manufacturing method thereof
HOYA MAGNETICS SINGAPORE PTE73 citations98
US7208236B2Apr 24, 2007
Magnetic recording medium with multi-portion carbon-based protection layer, and apparatus thereof
HOYA MAGNETICS SINGAPORE PTE75 citations98
US7174775B2Feb 13, 2007
Solid body surface evaluation method, magnetic disk evaluation method, magnetic disk, and manufacturing method thereof
HOYA MAGNETICS SINGAPORE PTE75 citations98
US7166319B2Jan 23, 2007
Magnetic disk and method of producing the same
HOYA MAGNETICS SINGAPORE PTE72 citations98
US6946191B2Sep 20, 2005
Magnetic recording medium
HOYA MAGNETICS SINGAPORE PTE73 citations98
US7105241B2Sep 12, 2006
Magnetic disk and method of manufacturing same
HOYA MAGNETICS SINGAPORE PTE73 citations97
UMEZAWA TEIICHIRO
3 patentsUS8623528B2Jan 7, 2014
Method of manufacturing perpendicular magnetic recording medium and perpendicular magnetic recording medium
UMEZAWA TEIICHIRO73 citations97
US8309239B2Nov 13, 2012
Perpendicular magnetic recording medium and method of manufacturing the same
UMEZAWA TEIICHIRO69 citations97
US8142916B2Mar 27, 2012
Magnetic recording medium
UMEZAWA TEIICHIRO72 citations97
ISHIYAMA MASAFUMI
3 patentsUS8425975B2Apr 23, 2013
Magnetic disk and magnetic disk manufacturing method
ISHIYAMA MASAFUMI70 citations97
US8092931B2Jan 10, 2012
Magnetic disk, method of manufacturing the magnetic disk and method of evaluating the magnetic disk
ISHIYAMA MASAFUMI70 citations96
US8709532B2Apr 29, 2014
Magnetic disk and manufacturing method thereof
ISHIYAMA MASAFUMI0 citations51