Inventor

Masahiko Sega

Inventor

Hiratsuka, JP

Overview

1993–2010

Patent span

Physics

Primary field (CPC G)

Patents· 20 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G11Bprimary

G11BInformation storage based on relative movement between record carrier and transducer95%

F16CShafts5%

PatentTitleYear

7,643,245'Magnetic disc unit with gap between magnetic disc and shroud'2010 7,580,221'Magnetic disk drive with compensation against disturbance'2009 7,535,672'Magnetic disk drive with elastic support member'2009 7,336,440'Magnetic disc unit with gap between magnetic disc and shroud'2008 7,330,334'Magnetic disk apparatus with shroud and having open space downstream of moveable arms in communication with bypass channel'2008 7,072,141'Magnetic disc unit with range of gap between disc and shroud'2006 6,982,852'Carriage arm assembly for magnetic disk drive'2006 6,927,936'Magnetic disk device'2005 6,898,049'Magnetic disk apparatus with air flow bypass channel'2005 6,751,050'Magnetic disc unit'2004 6,665,139'Magnetic-disc unit with gap between disc and shroud'2003 6,600,626'Magnetic disk apparatus'2003 6,560,066'Magnetic disk device'2003 6,501,645'Magnetic disk drive with unique cable wiring scheme and electronic device using the same'2002 6,369,977'Magnetic disk device'2002 6,115,213'Bearing assembly having compact thickness, spindle motor and actuator using the same bearing assembly, and magnetic disk drive'2000 5,862,011'PC card type magnetic disk device'1999 5,416,658'Information storage device using a rotary recording medium'1995 5,267,111'Voice coil motor with discrete flux paths'1993 5,241,435'Servo information recording method for a storage apparatus'1993

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1993–2005Patents assigned to HITACHI LTD (13)· patent assignee history

1993–2010Based in Hiratsuka, JP· patent location history

1993Based in Hiratuka, JP· patent location history

2006–2010Patents assigned to HITACHI GLOBAL STORAGE TECH (7)· patent assignee history

2009Based in Kanagawa, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
HITACHI LTD	13	1993–2005
HITACHI GLOBAL STORAGE TECH	7	2006–2010

Locations

Location	Patents	Span
Hiratsuka, JP	17	1993–2010
Kanagawa, JP	2	2009
Hiratuka, JP	1	1993