Inventor

KOISHI KENJI

JP98 patents

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

KOISHI KENJI

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

Magneto-optical disk having write-once identification marks and method for recording thereof

Optical disk, optical recorder, optical reproducer, crytocommunication system and program license system

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical recording/reproducing apparatus

Optical disk having a rewritable area and a read-only area

Information recording method, information recording apparatus and information recording medium

Recordable optical disk encrypted with disk identification and multiple keys

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Recordable optical disk including an auxiliary information presence indicator

Optical disc apparatus and recording power determining method thereof

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk reading device using both a decipher key and disk identification information

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk, optical disk barcode forming method, optical disk reproduction apparatus, marking forming apparatus, method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk, an optical barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical disk, optical disk barcode forming method, optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Method of maximum likelihood decoding and digital information playback apparatus

Optical recording and reproducing apparatus with abnormality detector

Optical recording and reproducing apparatus

Optical disk, optical recorder, optical reproducer, cryptocommunication system and program license system

Device for encoding encrypted information on an optical disk

Recording medium, recorder, reproducer, cryptocommunication system and program license system

Method for reproducing information data from magneto-optical recording medium using linear polarized beam

Optical information recording/reproducing method and optical information recording/reproducing apparatus

Optical disk recordable using both a cipher key and disk identification information for encryption

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk

Optical information recording/reproducing apparatus

Optical disk system

Optical disk having an index mark

Optical and reversible recording and reproducing apparatus

Optical data recording and reproducing apparatus

Method and apparatus for optically recording and reproducing information

Optical having index mark and sector mark

Semiconductor laser driving system

Optical data recording method

Semiconductor laser control method and semiconductor laser control device

Semiconductor laser control circuit

Semiconductor laser drive circuit with peak detection and control

Optical recording and reproducing head

Optical data recording and reproducing apparatus

Apparatus for locating a track on disc-like optical information carriers

Light source intensity control in an optical recording and reproducing apparatus

Semiconductor laser control circuit and laser light source

Method and apparatus for recording data on an optical disk and or groove

Semiconductor laser diode driving device and driving method

PANASONIC CORP

Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk