6 Matching Results

Search Results

Patent for a rotary drilling apparatus that specifies in wells and mines.

Date: November 5, 1918

Creator: Robert E. Carmichael

Partner: UNT Libraries Government Documents Department

Patent for certain new and useful improvements in two piece boxes, including instructions and illustrations.

Date: November 28, 1899

Creator: Armstrong, Martin

Partner: UNT Libraries Government Documents Department

Patent for a process of treating waste animal matter from tallow-rendering factories with plaster-of-paris for use as fertilizer.

Date: November 25, 1873

Creator: Stevens, Hennell

Partner: UNT Libraries Government Documents Department

Patent for "a new and useful Improvement in Screw-Propellers and their adaptation to the hulls of vessels" (lines 4-6) including illustrations.

Date: November 9, 1875

Creator: Wilson, Joseph Erwin

Partner: UNT Libraries Government Documents Department

Patent for an apparatus that prevents the clogging of the working barrels of pumps.

Date: November 13, 1917

Creator: Carmichael, Robert E.

Partner: UNT Libraries Government Documents Department

Patent for a cotton picker. Illustration included.

Date: November 29, 1904

Creator: Hoskins, William Wharton

Partner: UNT Libraries Government Documents Department