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Adjustable Spring Clamp

Description: Patent for an improved adjustable spring clamp design.
Date: May 13, 1919
Creator: Hillin, H. C.
Partner: UNT Libraries Government Documents Department

Slot Angle Bar

Description: Patent for a new slot angle bar design.
Date: May 13, 1919
Creator: Rice, E. B.
Partner: UNT Libraries Government Documents Department
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