Inventor

TSUYOSHI TOSHIAKI

JP35 patents

⚠️ This page may combine multiple inventors who share the name “TSUYOSHI TOSHIAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TSUYOSHI TOSHIAKI

HITACHI LTD

Information recording medium with clock information therein

Magnetic disk apparatus of constant-density recording type, magnetic disk used therefor and servo-writing device for patterning on the magnetic disk

Composite tracking servo system for optical disc apparatus with track offset correction

Method and apparatus for composite tracking servo system with track offset correction and rotary optical disc having at least one correction mark for correcting track offset

Method and apparatus for composite wobbled and push-pull tracking servo system

Method of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the method

Magnetic disk drive with sensing current adjustment of MR head

Magnetic recording and reproducing apparatus with thermal asperity correction

Magnetic recording and reproducing apparatus with reproducing head of magnetoresistive type having control of magnetic bias level

Light spot position control system and method by sampling servo

Apparatus and record carrier for optically writing information

Information recording and reproducing apparatus with tracking control by sampling

Method and apparatus for optimizing the recording and reproducing of information from magnetic disks

Information recording medium and method for reproducing the same

Magneto-optical data recording system

Method and associated apparatus and medium for optical recording and reproducing information

Information recording apparatus and method for modulated magneto-optical recording medium

Magneto optical recording medium apparatus and method utilizing light pulse magnetic modulation recording

Magneto-optical data recording system continuously irradiating optical pulsers

High speed seek sector servo magnetic disk drive unit

Magnetic disk drive

Light spot position control system and method by sampled servo

Optical information tracking apparatus

Magnetic recording drive having arrangements for average useful life of magnetorestive effects sensors

Phase compensation apparatus for an optical information recording and reproducing system

Magnetic disk apparatus

Digital magnetic writing and reading apparatus

Device for optically tracking information

Method and apparatus for optimizing the recording and reproducing of information from magnetic disks

Method and apparatus for beam-track alignment in optical disk apparatus

Magneto-optical data recording apparatus using a sample-servo system for applying heating pulses to record data

Optical information recording and reproducing apparatus with tracking control by sampling

Magnetic recording drive having arrangement for averaging useful life of magnetoresistive effect sensors

Magnetic recording drive

HITACHI GLOBAL STORAGE TECH

Disk drive with position detection