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in subjects: "Science and Technology - Tools"

Patent for an improved double-acting pump jack that will require less parts and external force to operate and maintain.

Date: April 29, 1919

Creator: Lively, William

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for "a new and useful acetylene-gas generator" (lines 5-6), including illustrations and instructions.

Date: April 26, 1898

Creator: Williams, Benjamin F.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a new and improved cement kiln for drying gypsum and other materials employed in the manufacture of cement and plaster.

Date: April 28, 1902

Creator: Malone, Samuel R.

Item Type: Patent

Partner: UNT Libraries Government Documents Department