Inventor
KOISO NAGATUGU
11 patents
⚠️ This page may combine multiple inventors who share the name “KOISO NAGATUGU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
10 patentsUS6221508B1Apr 24, 2001
Magnetic recording media
HITACHI LTD47 citations96
US5290629AMar 1, 1994
Magnetic film having a magnetic phase with crystallites of 200 A or less and an oxide phase present at the grain boundaries
HITACHI LTD32 citations92
US4288283ASep 8, 1981
Method of forming a microscopic pattern
HITACHI LTD27 citations81
US6574060B2Jun 3, 2003
Magnetic storage apparatus
HITACHI LTD9 citations74
US6033792AMar 7, 2000
Soft magnetic thin film, and magnetic head and magnetic recording device using the same
HITACHI LTD8 citations74
US5873955AFeb 23, 1999
Soft magnetic thin film, and magnetic head and magnetic recording device using the same
HITACHI LTD11 citations74
US4460412AJul 17, 1984
Method of making magnetic bubble memory device by implanting hydrogen ions and annealing
HITACHI LTD14 citations74
US5962153AOct 5, 1999
Soft magnetic thin film, and magnetic head and magnetic recording apparatus using the film
HITACHI LTD9 citations73
US5858548AJan 12, 1999
Soft magnetic thin film, and magnetic head and magnetic recording device using the same
HITACHI LTD12 citations71
US4262054AApr 14, 1981
Magnetic bubble memory device
HITACHI LTD3 citations61