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Ink proofing system
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Patent number 9,440,426
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Issue date Sep 13, 2016
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Probity Engineering, LLC
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Ronald K Westby
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Offset hand proofer tool
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Patent number 8,720,335
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Issue date May 13, 2014
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Probity Engineering, LLC
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Ronald K. Westby
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Hand proofer tool
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Patent number 8,539,880
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Issue date Sep 24, 2013
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Probity Engineering, LLC
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Ronald K Westby
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS