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Light emitting device
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Patent number 5,223,723
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Issue date Jun 29, 1993
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AT&T Bell Laboratories
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Sergey Luryi
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G02 - OPTICS
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Silicon germanium photodetector
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Patent number 4,725,870
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Issue date Feb 16, 1988
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American Telephone and Telegraph Company, AT&T Bell Laboratories
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John C. Bean
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B82 - NANO-TECHNOLOGY
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Negative transconductance device
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Patent number 4,704,622
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Issue date Nov 3, 1987
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American Telephone and Telegraph Company, AT&T Bell Laboratories
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Federico Capasso
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B82 - NANO-TECHNOLOGY
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