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Pump-Barrel Attachment.
Patent for a pump barrel attachment, which has a trap to catch any material falling off the valve.
Date:
September 13, 1910
Creator:
Riddle, William Nelson
System:
The Portal to Texas History
Coin-Controlled Slide
Patent for a coin-controlled slide used for operating mechanical musical instruments and vending machines. Illustrations included.
Date:
September 13, 1910
Creator:
Hammond, Robert P.
System:
The Portal to Texas History