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Portable Power Stump-Boring Machine.

Patent for an invention that improves upon portable power stump boring machines to prevent breakage of the auger or shaft, including instructions and illustrations.

Date: October 9, 1917

Creator: Leach, William W.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Railroad-Rail

Patent for railroad rail that does not need to joined with a bolt and can be locked in place to prevent spreading.

Date: October 22, 1918

Creator: Huffman, Henry W.