Hiroshi Sanpei

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Yamagata-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical pickup having two wavelength laser and simple structure
- Patent number 6,925,045
- Issue date Aug 2, 2005
- Mitsumi Electric Co., Ltd.
- Masayoshi Sugawara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having cut-out portions for different recording densi...
- Patent number 6,404,591
- Issue date Jun 11, 2002
- Mitsumi Electric Co., Ltd.
- Hiroshi Sanpei
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Optical pickup having two wavelength laser and simple structure
- Publication number 20020024918
- Publication date Feb 28, 2002
- MITSUMI ELECTRIC CO., LTD.
- Masayoshi Sugawara
- G11 - INFORMATION STORAGE