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Patent for a new and useful ventilator, including instructions and illustrations.

Date: February 27, 1900

Creator: Schumacher, Robert H.

Partner: UNT Libraries Government Documents Department

Patent for an adjustable plow attachment that is placed onto a plow blade and sweeps aside earth while "forming a load-bearing surface." (p. 1)

Date: December 25, 1900

Creator: Bracewell, William B.

Partner: UNT Libraries Government Documents Department

Patent for a new design of rail joints in which headed bolts and wedge plate have keyhole slots, including with illustrations.

Date: April 24, 1900

Creator: Park, Henry J.

Partner: UNT Libraries Government Documents Department