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Photographic-Printing Machine

Description: Patent for a new and improved Photographic Printing Machine. The device allows for accurately positioning negative to contact accurately with printing paper.
Date: September 17, 1912
Creator: Loving, Roy R.
Partner: UNT Libraries Government Documents Department

Improvement in Gang-Plows.

Description: Patent for improvements to the gang-plow consisting of "an adjustable frame, within which two or more ordinary plows can be arranged to form the gang, said frame being constructed so as to enable one set of plows to run deep, while the other set can be made to run shallow." (Lines 15-19) Includes instructions and illustrations.
Date: July 17, 1877
Creator: Crump, Thomas J.
Partner: UNT Libraries Government Documents Department
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