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Ball-Bearing.

Description: Patent for a new and useful ball bearing, including instructions and illustrations.
Date: October 17, 1899
Creator: Millen, George
Partner: UNT Libraries Government Documents Department

Automatic Telephone-Directory.

Description: Patent for a new and useful automatic telephone directory, including instructions and illustrations.
Date: October 17, 1899
Creator: Neuendorff, John B.
Partner: UNT Libraries Government Documents Department
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