Inventor
TSUMITA NORIKAZU
17 patents
Patents
17 patentsUS5147732ASep 15, 1992
Longitudinal magnetic recording media and magnetic memory units
HITACHI LTD96 citations96
US5143794ASep 1, 1992
Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus
HITACHI LTD49 citations96
US4833020AMay 23, 1989
Magnetic recording medium
HITACHI LTD77 citations96
US5236791AAug 17, 1993
Magnetic recording medium and magnetic storage
HITACHI LTD58 citations95
US6335103B1Jan 1, 2002
Magnetic recording media for longitudinal recording
HITACHI LTD21 citations92
US5665478ASep 9, 1997
Magnetic recording media for longitudinal recording
HITACHI LTD32 citations92
US4950548AAug 21, 1990
Magnetic recording medium and method of producing same
HITACHI LTD42 citations92
US4883711ANov 28, 1989
Magnetic recording medium
HITACHI LTD30 citations92
US4743491AMay 10, 1988
Perpendicular magnetic recording medium and fabrication method therefor
HITACHI LTD46 citations92
US4415262ANov 15, 1983
Photomask
HITACHI LTD28 citations92
US5285343AFeb 8, 1994
Magnetic disk with surface protective layer having convex portions and magnetic disk apparatus including such a magnetic disk
HITACHI LTD26 citations89
US6627253B2Sep 30, 2003
Magnetic recording media for longitudinal recording, process for producing the same and magnetic memory apparatus
HITACHI LTD16 citations84
US4404233ASep 13, 1983
Ion implanting method
HITACHI LTD23 citations82
US4288283ASep 8, 1981
Method of forming a microscopic pattern
HITACHI LTD27 citations81
US4786553ANov 22, 1988
Magnetic recording medium
HITACHI LTD13 citations73
US4939045AJul 3, 1990
Magnetic recording medium
HITACHI LTD5 citations62
US4344153AAug 10, 1982
Magnetic bubble memory device and method of fabricating the same
HITACHI LTD5 citations62