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Patent for a boiler stay bolt. Illustration included.

Date: September 20, 1904

Creator: Peters, Joseph & Coleman, John

Partner: UNT Libraries Government Documents Department

Patent for a valve and valve seat made of stainless steel for the purpose of preventing rusting and corrosion.

Date: September 20, 1921

Creator: Bevelle, Joseph C. & Smith, Joseph J.

Partner: UNT Libraries Government Documents Department