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Primary view of Improvement in Mixing Mineral and Fossil Substances with Bituminized Clay to Form a Plastic Material.
Lea, Pryor
September 26, 1876
Primary view of Improvement in Combining Bitumen and Clay.
Lea, Pryor
September 24, 1872
Primary view of Wrench
Ponton, Henry H
September 12, 1916
Primary view of Feeding Mechanism for Cotten-Gins
Riemenschneider, Adolph
September 23, 1913
Primary view of Hay-Press
McNeill, Charles De Witte
September 3, 1889
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