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Humidity tolerant scan lens
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Patent number 6,807,011
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Issue date Oct 19, 2004
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Lexmark International, Inc.
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Roger Steven Cannon
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G02 - OPTICS
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Monolithic optical scanner
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Patent number 5,157,535
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Issue date Oct 20, 1992
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Lexmark International, Inc.
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Philip J. Heink
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G02 - OPTICS
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Coaxial optical scanner
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Patent number 4,346,292
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Issue date Aug 24, 1982
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International Business Machines Corporation
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Wilson M. Routt
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G06 - COMPUTING CALCULATING COUNTING
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Two slit illumination aperture
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Patent number 4,260,249
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Issue date Apr 7, 1981
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International Business Machines
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John D. Armitage
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G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY