Inventor
Tomoyoshi Yamada
Inventor
Kawasaki, JP
Overview
Patents· 31 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 transducer64%
H02KDynamo-electric machines11%
F16JPistons5%
H10NElectric solid-state devices not otherwise provided for5%
Y10TTechnical subjects covered by former us classification5%
B60RVehicles, vehicle fittings, or vehicle parts, not otherwise provided for2%
F02FCylinders, pistons or casings, for combustion engines2%
F16DCouplings for transmitting rotation2%
H01FMagnets2%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests2%
PatentTitleYear
9,177,581'Head position demodulation method and magnetic disk device'20158,964,325'Magnetic disk device and method for read/write offset error correction'20158,908,303'Method for servo demodulation and disk storage apparatus'20148,848,303'Disk storage apparatus and method for servo demodulation'20147,787,200'Disk-device correcting system, information managing device, master-disk producing device, and master-disk producing method'20107,515,377'Storage apparatus and control method for detecting vibration produced during seeking'20097,508,620'Disk apparatus, information processing system, and information providing apparatus'20097,385,779'Disk device with bi-directional communication function'20087,158,349'Ramp member assembly including flying slider in recording disk drive'20077,154,702'Head actuator'20066,904,010'Method of writing servo tracks for disk file apparatus using write start or stop sectors'20056,819,519'Head position control method for a disk device and the disk device'20046,671,120'Head carriage assembly drive system and disk drive'20036,538,854'Actuator using piezoelectric element and head-positioning mechanism using the actuator'20036,496,322'Head position control for a disk drive which performs recording about the rotational center even if the recorded servo information is eccentric'20026,341,051'Disk drive having external shock resistance'20026,327,120'Actuator using piezoelectric element and head-positioning mechanism using the actuator'20016,128,153'Head position control for a disk drive which performs recording about the rotational center even if the recorded servo information is eccentric'20006,081,990'Method for incorporating disk media into magnetic disk drive'20006,025,973'Construction for attaching a disk in a disk drive'20006,016,237'Shaft construction of a disk drive'20005,926,347'Magnetic disk drive provided with means for pressing head against disk'19995,880,904'Disk drive having a thickness equal to an IC memory card'19995,764,441'Head actuator having reduced and controlled vibration characteristics for high speed disk drive systems'19985,608,592'Head actuator'19975,519,270'Spindle motor and disk drive having the same'19965,349,486'Magnetic disk storage apparatus having a vibration proof structure'19945,041,935'Rotary actuator for positioning magnetic heads in a disk drive'19914,734,323'Vibration damping soundproof sheets for use in vehicles'19884,573,693'Dust boot with multiple layer construction of bellows'19864,396,200'Packing assembly for sealing between cylinder head and cylinder head cover gasket'1983Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1983–1988Patents assigned to TOYODA GOSEI KK (3)· patent assignee history
1983–1986Based in Inazawa, JP· patent location history
1988Based in Toyohashi, JP· patent location history
1991–2009Patents assigned to FUJITSU LTD (23)· patent assignee history
1991–2015Based in Yokohama, JP· patent location history
1996–2010Based in Kawasaki, JP· patent location history
2001–2003Patents assigned to FDK CORP (2)· patent assignee history
2010Patents assigned to TOSHIBA STORAGE DEVICE CORP (1)· patent assignee history
2014–2015Patents assigned to TOSHIBA KK (4)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 23 | 1991–2009 |
| TOSHIBA KK | 4 | 2014–2015 |
| TOYODA GOSEI KK | 3 | 1983–1988 |
| FDK CORP | 2 | 2001–2003 |
| TOSHIBA STORAGE DEVICE CORP | 1 | 2010 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 21 | 1996–2010 |
| Yokohama, JP | 7 | 1991–2015 |
| Inazawa, JP | 2 | 1983–1986 |
| Toyohashi, JP | 1 | 1988 |