Inventor

TSUYUGUCHI HIROSHI

JP53 patents

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

TSUYUGUCHI HIROSHI

TEAC CORP

Apparatus for selective retrieval of information streams or items

Power saving system for rotating disk data storage apparatus

Stepping motor drive system and method capable of stopping the rotor in a required angular position

Information processing apparatus having locking means permitting ready detachment of the magnetic disk drive assembly

Method and apparatus for wobble-free data recovery from CD-rom or the like

Apparatus for constant angular velocity reading of constant linear velocity disks

Method and apparatus for discriminating between unformatted magnetic disk assemblies of two different storage capacities

Optical head apparatus applicable to optical disc apparatus

Method and apparatus for rewriting on a magnetic disk on which data has been written by another apparatus having half the track density capability of the first apparatus

Stepping motor drive method and system capable of stopping the rotor in a required angular position

Data transfer apparatus for use with a flexible magnetic disk or the like

Disk drive or like peripheral storage device adapted for firmware upgrading, self-testing, etc.

Circuit arrangement and method for saving power in magnetic disk apparatus without head displacement

Motor current consumption control system for a flexible magnetic disk drive or the like

System for eliminating noise arising from difference in polarity of magnetization by tunnel erase heads

Apparatus for recording and/or erasing an information signal on and from a magneto-optical disk wherein the magnetic biasing field means is part of a rotor magnet included in a stepping motor

Circuit for generating a dual purpose control signal in a disk apparatus

Power-saving read/write circuit for apparatus for digital data transfer with a magnetic disk

Circuit arrangement for inhibiting writing on a magnetic disk during the settling time of a transducer head

Method and apparatus for formatting magnetic disks with use of host equipment programmed for smaller capacity magnetic disks

Power saving circuit arrangement for an apparatus for data transfer with flexible magnetic disk or the like

Assembling position adjusting mechanism of a spindle motor for a magnetic disk apparatus

Power saving system for rotating disk data storage apparatus

Head carriage apparatus moved by a lead-screw shaft including resilient means for pressing the lead-screw shaft in a slanting direction toward the head carriage

Magneto-optic recording apparatus for recording information selectively on both sides of the recording medium

Optical permitting record/playback from both sides of an optical disk

Power-saving data transfer apparatus with a flexible magnetic disk or the like

Power-saving data transfer apparatus with a flexible magnetic disk or the like

Pilot lamp current consumption reduction system for a flexible magnetic disk drive or the like

Magnetic disc recording/reproducing apparatus with semiconductor memory card recording/reproducing device

Optical tracking servo apparatus

Data transmission device for reading data from a memory medium and transmitting the data to a magnetic reproducing apparatus with a reduced noise

Transducer recalibration system and method for a rotating disk data storage

Method and apparatus for the high speed driving of a stepper motor against seek error upon power restoration in a microcomputer system

Power saving system for file protect and disk capacity sensors in rotating disk data storage apparatus

Power saving circuit arrangement for data transfer apparatus with a disklike record medium

Magnetic disk drive with a disk leveling mechanism

System for holding a track counter active despite power suspension in rotating disk data storage apparatus

Disk drive circuit arrangement for the suppression of undesired index pulses

Circuit arrangement for the determination of the constant speed rotation of a disklike record medium

Rotating disk data storage apparatus capable of preventing head travel when the disk is not loaded

Floppy disk control unit and apparatus having a floppy disk control unit

Data transfer apparatus with a disklike record medium and a method of operation therefore

Data transfer apparatus with a disklike record medium

Optical recording and reproducing apparatus for verifying correct writing of information signal

Pulse generating system responding to instruction pulses for generating driving pulses for diving motor

Data recording/reproducing system using optical disk apparatus

Signal selecting circuit which selectively outputs predetermined signal to host computer compatible with plurality of computer hardware types and disk drive having such signal selecting circuit

MITSUBISHI ELECTRIC CORP

Disk apparatus having a power consumption reducing mechanism

VICTOR COMPANY OF JAPAN

Magnetic disk apparatus