Kenji Ohta

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Kyoto, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical disk, disk substrate, and drive
- Patent number 7,027,385
- Issue date Apr 11, 2006
- Hitachi Maxell, Ltd.
- Katsusuke Shimazaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Cartridge in which disk is stored
- Patent number 6,687,216
- Issue date Feb 3, 2004
- Sanyo Electric Co., LTD
- Hiroshi Nakashima
- G11 - INFORMATION STORAGE
Information Patent Grant
Erasure prevention in disc cartridge
- Patent number 6,504,679
- Issue date Jan 7, 2003
- Hitachi Maxell, Ltd.
- Kenji Ohta
- G11 - INFORMATION STORAGE
Information Patent Grant
Disc cartridge
- Patent number D435854
- Issue date Jan 2, 2001
- Hitachi Maxell, Ltd.
- Hiroyoshi Takagi
- D14 - Recording, communication, or information retrieval equipment
Information Patent Grant
Tamper-proof lid lock in disc cartridge
- Patent number 5,946,290
- Issue date Aug 31, 1999
- Hitachi Maxell, Ltd.
- Hikaru Mizutani
- G11 - INFORMATION STORAGE
Information Patent Grant
Disc cartridge with slide shutter having catch pieces
- Patent number 5,926,454
- Issue date Jul 20, 1999
- Hitachi Maxell, Ltd.
- Hikaru Mizutani
- G11 - INFORMATION STORAGE
Information Patent Grant
Disc cartridge lid structure
- Patent number 5,903,541
- Issue date May 11, 1999
- Hitachi Maxell, Ltd.
- Hikaru Mizutani
- G11 - INFORMATION STORAGE