Tetsuji Nakazawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Data erasure preventing method and circuit thereof and optical disc...
- Patent number 6,256,274
- Issue date Jul 3, 2001
- Sony Corporation
- Yuji Arataki
- G11 - INFORMATION STORAGE
Information Patent Grant
Rotation control apparatus, reproduction apparatus to which rotatio...
- Patent number 6,185,172
- Issue date Feb 6, 2001
- Sony Corporation
- Tetsuji Nakazawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Phase locked loop circuit, reproduction apparatus and phase locking...
- Patent number 6,150,888
- Issue date Nov 21, 2000
- Sony Corporation
- Tetsuji Nakazawa
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Phase locked loop circuit and reproducing apparatus
- Patent number 5,939,948
- Issue date Aug 17, 1999
- Sony Corporation
- Tetsuji Nakazawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording/reproducing apparatus with selective attenuation of repro...
- Patent number 4,395,739
- Issue date Jul 26, 1983
- Sony Corporation
- Tetsuji Nakazawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Operating mode change-over apparatus in tape recording and/or repro...
- Patent number 4,360,846
- Issue date Nov 23, 1982
- Sony Corporation
- Toshio Asai
- G11 - INFORMATION STORAGE