UNT Libraries Government Documents Department - 2 Matching Results

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Boring and Mortising Machine.
Patent for a machine to bore square holes in substitute for a chisel and reduce labor, including illustration. The inventor calls it a "Mortise and Tenon Machine."
Brick-Machine.
Patent for a machine, which the inventor calls "The Concussion Brick-Machine", that makes bricks using molds, including illustrations.
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