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Spring-wheel.

Description: Patent for an enhanced spring-wheel featuring novel adjustments to the tread and assembly of side plates, includes illustrations.
Date: September 2, 1919
Creator: Thomas, James Alfored
Partner: UNT Libraries Government Documents Department

Sash Balance.

Description: Patent for an improved window sash balance, including instructions and illustrations.
Date: September 8, 1914
Creator: Jones, John T.
Partner: UNT Libraries Government Documents Department
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