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Print head slot ribs
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Patent number 8,888,252
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Issue date Nov 18, 2014
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Hewlett-Packard Development Company, L.P.
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Siddhartha Bhowmik
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Print head die slot ribs
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Patent number 8,262,204
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Issue date Sep 11, 2012
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Hewlett-Packard Development Company, L.P.
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David M. Braun
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Electromagnetic waveguide
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Patent number 7,470,581
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Issue date Dec 30, 2008
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Hewlett-Packard Development Company, L.P.
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Swaroop K. Kommera
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B82 - NANO-TECHNOLOGY