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Patent for improvements to sad-iron heaters, including illustrations.

Date: September 7, 1875

Creator: Cottingham, Gideon Wesley

Partner: UNT Libraries Government Documents Department

Patent for improving the coloring process of enameled photographs by using collodio-gelatine instead of warm gelatine.

Date: September 7, 1875

Creator: Williams, William W.

Partner: UNT Libraries Government Documents Department

Patent for "construction and arrangement of a churn-dasher..." ( lines 13-14) including instructions and illustrations.

Date: September 7, 1875

Creator: Bright, John, D.

Partner: UNT Libraries Government Documents Department