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Clamp

Description: Patent for clamps used in framing and forming of concrete construction. The clamps are easily removed and reused eliminating the need for wooden framing used in the past.
Date: February 24, 1920
Creator: Ferguson, William D.

Spring Wheel

Description: Patent for a spring wheel design that will "effectually resist both the vertical and lateral stresses to which the wheel is subjected when in use" (lines 11-13), including illustrations.
Date: February 24, 1914
Creator: Mathiesen, Marius
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