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Optical coupler method
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Patent number 5,199,966
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Issue date Apr 6, 1993
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AT&T Bell Laboratories
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George T. Harvey
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G02 - OPTICS
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Method for aligning photomasks
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Patent number 4,904,087
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Issue date Feb 27, 1990
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American Telephone & Telegraph Co., AT&T Bell Laboratories
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George T. Harvey
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Method for aligning photomasks
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Patent number 4,835,078
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Issue date May 30, 1989
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American Telephone and Telegraph Company
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George T. Harvey
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY