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in subjects: "water heaters"

Patent for a portable heater for heating water.

Date: March 7, 1911

Creator: Ellis, Frank B. & Walker, James L.

Partner: UNT Libraries Government Documents Department

Patent for a new electric water heater that forces water to travel around heated wires in tubes, including illustrations.

Date: May 7, 1918

Creator: Valdes, Salvador M.

Partner: UNT Libraries Government Documents Department