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  • Air Duct Patent T-Shirt

    Air Duct Patent T-Shirt

    $21.95
    This unique t-shirt features Air Duct schematics from a genuine vintage U.S. Patent filed in 1940! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hvac technicians, engineers & contractors! Product...
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    $21.95
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  • Air Conditioning Patent T-Shirt

    Air Conditioning Patent T-Shirt

    $21.95
    This unique t-shirt features Air Conditioning schematics from a genuine vintage U.S. Patent filed in 1940! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hvac technicians, engineers &...
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    $21.95
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  • Air Conditioner Patent T-Shirt

    Air Conditioner Patent T-Shirt

    $21.95
    This unique t-shirt features Air Conditioner schematics from a genuine vintage U.S. Patent filed in 1968! These shirts look awesome, fit well, are great conversation starters and an excellent gift for hvac technicians, engineers &...
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