Inventor

FUJIIE KAZUHIKO

JP46 patents

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

FUJIIE KAZUHIKO

SONY CORP

Reproducing apparatus, recording apparatus, and recording medium

Apparatus for reproducing recorded data comprising interleaved clusters and cluster linking sectors

Method and apparatus for reading digital data bursts comprising data clusters and cluster linking sectors

Recording/reproducing apparatus for compressed data

Photo detector circuit having a current mirror circuit

Magneto-optical disc having preformatted information to prevent unauthorized data duplication

Recording medium and a method and apparatus for recording and reproducing digital data in data clusters and cluster linking sectors on the recording medium

Optical disk discriminating device

Optical pickup with a hologram to limit the aperture of two light beams with different wavelengths

Optical disc with magnetic member in a recessed portion thereof and method for producing said optical disc

Recording/reproducing apparatus for both read-only and magneto-optical disc-shaped recording medium

Magneto-optical recording/reproducing apparatus with optical pickup device having a multi-layer dielectric film beam splitter

Optical head including multiple photo detectors for reading signals and error signals for servoing from both a read-only recording medium and a magneto-optical recording medium

Magneto-optical recording/reproducing apparatus with optical pickup device having a multi-layer dielectric film beam splitter

Photodetector for recording/reproducing apparatus for both read only and magneto-optical disk shaped recording medium

Magnetic head drive circuit

Apparatus and method of recording and reproducing data using a disk

Recording device that identifies recordable areas of a disk record

Tracking servocontrol circuits for reducing gain to avoid tracking defect in an optical reproducing apparatus

Optical recording medium and disc cartridge

Recording and/or reproducing method and apparatus with dubbing mode

Defect detecting circuit and reproducing apparatus having the defect detecting circuit

Apparatus for generating tracking error signals in a differential phase detection system

Optical disc player with focus control during search mode

Optical recording medium and disc cartridge

Read-only optical recording medium and disc cartridge

Optical recording medium and disc cartridge having 2 GB capacity

Circuit for varying a loop gain of a spindle servo

Electromagnetic shield device for magneto-optical recording apparatus

Coding/decoding apparatus

Optical disk recording and reproducing device

Disc players

Disc players

Recordable optical disc storage device with limited storage capacity, and recording apparatus therefor

Optical pickup

Disc player

Method for reproducing information data from a magneto-optical storage medium in reverse direction with recording

Magneto-optical recording medium and signal reproduction method

Optical recording, producing apparatus, and method with peak-hold voltage features

Optical recording, producing apparatus, and method with peak-hold voltage features

Magnetic head device and recording/reproducing apparatus using the magnetic head device

Optical recording medium and disc cartridge

Method for manufacturing magneto-optical recording medium

Signal detecting device and signal detecting method

ISHIMOTO TSUTOMU

Short-pulse light source, laser light emission method, optical device, optical disc device, and optical pickup

FUJIIE KAZUHIKO

Short-pulse light-source device, laser driving method, optical pickup, and optical disc apparatus