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Coating for optical devices
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Patent number 4,749,255
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Issue date Jun 7, 1988
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American Telephone and Telegraph Company, AT&T Bell Laboratories
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Utpal K. Chakrabarti
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C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
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Light emitting diode
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Patent number 4,447,822
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Issue date May 8, 1984
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Bell Telephone Laboratories, Incorporated
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Aland K. Chin
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H01 - BASIC ELECTRIC ELEMENTS
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p-i-n Photodiodes
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Patent number 4,443,809
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Issue date Apr 17, 1984
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AT&T Bell Telephone Laboratories, Incorporated
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Aland K. Chin
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H01 - BASIC ELECTRIC ELEMENTS
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