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Buried heterojunction laser
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Patent number 4,630,279
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Issue date Dec 16, 1986
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Hitachi, Ltd.
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Takashi Kajimura
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H01 - BASIC ELECTRIC ELEMENTS
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Semiconductor laser device
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Patent number 4,506,366
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Issue date Mar 19, 1985
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Hitachi, Ltd.
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Naoki Chinone
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H01 - BASIC ELECTRIC ELEMENTS
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Optical pickup
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Patent number 4,480,325
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Issue date Oct 30, 1984
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Hitachi, Ltd.
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Kunio Aiki
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G11 - INFORMATION STORAGE
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Semiconductor laser device
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Patent number 4,432,091
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Issue date Feb 14, 1984
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Hitachi, Ltd.
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Takao Kuroda
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H01 - BASIC ELECTRIC ELEMENTS
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Semiconductor laser device
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Patent number 4,329,658
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Issue date May 11, 1982
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Hitachi, Ltd.
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Atsutoshi Doi
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H01 - BASIC ELECTRIC ELEMENTS
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