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Oil Press Mat.

Description: Patent for a new and improved oil press mat. This design consists in "having its body portion composed of card-board cut to the size of the press-box, the adjacent faces being covered with sheet metal, which is pressed or stamped into the paper body to give the required cavity, which is bounded by raised margins and transverse ribs struck up from the metal, and supported by paper strips interposed between the layers of card-board, the two leaves of the mat having a leather backing and being hin… more
Date: September 18, 1883
Creator: Osborn, Adelbert E.
Partner: UNT Libraries Government Documents Department

Mold for Making Sewers.

Description: Patent for a new and improved sewer mold. This design consists in "[a]n expansible and contractible reversible mold for sewers, in form in cross-section of either a semi-circle, semi-ellipse, or semi-ovate, formed of segmental portions hinged together and provided with stay-braces and thrusting tie-rods" (lines 76-81).
Date: June 18, 1889
Creator: Baade, John
Partner: UNT Libraries Government Documents Department
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