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Telegraph and Telephone Insulator.

Description: Patent for a telegraph and telephone insulator, which prevents the wires from slipping out of the insulator by the use of grooves placed in the holder.
Date: October 15, 1907
Creator: Copper, John A.

Wheelwright-Machine

Description: Patent for a hand-operated wheelwright machine designed for drilling the tires of a vehicle for means of holding tire retaining bolts.
Date: August 20, 1907
Creator: Robbins, James M.
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