LexDanaLexDanabeta
Inventor

Kohji Serizawa

Inventor
Yokohama, JP

Overview

12→
Patents
1991–2009
Patent span
Physics
Primary field (CPC G)

Patents· 12 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 transducer45%
G11CStatic stores15%
H05KPrinted circuits15%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1015%
H10BElectronic memory devices10%
PatentTitleYear
7,573,671'Disk device with reduced flutter'20097,545,599'Disk drive with vibration suppression member disposed near head assembly'20096,690,540'Disk drive damper having a thin portion and a plurality of thick portions'20046,657,812'Disk drive including a dust catching chamber and an associated gasket portion'20036,633,452'Disk drive apparatus, hard disk drive, and enclosure for hard disk drive'20036,594,099'Apparatus for erasing data stored on a magnetic disk'20036,137,658'Apparatus for guiding and locking a rotary actuator'20006,067,209'Disk drive device with shock resistance flexure and ramp limited system'20005,818,657'Disk drive with impulse torque generating element'19985,334,875'Stacked semiconductor memory device and semiconductor memory module containing the same'19945,198,888'Semiconductor stacked device'19935,028,986'Semiconductor device and semiconductor module with a plurality of stacked semiconductor devices'1991

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1991–1994Patents assigned to HITACHI LTD (3)· patent assignee history
1991Patents assigned to HITACHITOBU SEMICONDUCTOR LTD (1)· patent assignee history
1991–1994Based in Fujisawa, JP· patent location history
1993–1994Patents assigned to HITACHI TOBU SEMICONDUCTOR LTD (2)· patent assignee history
1998–2003Patents assigned to IBM (5)· patent assignee history
1998–2009Based in Kanagawa, JP· patent location history
2000Based in Zama, JP· patent location history
2003–2009Patents assigned to HITACHI GLOBAL STORAGE TECH (4)· patent assignee history
2003–2004Based in Yokohama, JP· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
IBM51998–2003
HITACHI GLOBAL STORAGE TECH42003–2009
HITACHI LTD31991–1994
HITACHI TOBU SEMICONDUCTOR LTD21993–1994
HITACHITOBU SEMICONDUCTOR LTD11991
Locations
LocationPatentsSpan
Yokohama, JP42003–2004
Kanagawa, JP31998–2009
Fujisawa, JP31991–1994
Zama, JP22000