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Ironing-Machine

Description: Patent for an ironing machine that has an adjustable ironing board.
Date: June 27, 1911
Creator: Green, James J.
Partner: UNT Libraries Government Documents Department

Spark-Plug

Description: Patent for a spark plug that has a cooling method for keeping the porcelain section from cracking and a better way of keeping it clean.
Date: June 27, 1911
Creator: Harpst, Fred E.
Partner: UNT Libraries Government Documents Department
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