States
Counties
3 Matching Results
Results open in a new window/tab.
Results:
1 - 3 of
3
Coin-Controlled Vending-Machine.
Patent for a con-controlled vending-machine that sells stamps and similar products including illustrations. The machine "compels a complete cycle of operation for each coin received and cannot be rendered inoperative through the deposit of a plurality of coins in the chute or while the operation of the machine is in progress." (lines 14-17).
Date:
October 9, 1917
Creator:
William O. Wolford
System:
The Portal to Texas History
Apparatus for Demonstrating and Testing Piston Packing Rings
Patent for an apparatus that allows for a more accurate and efficient way to test piston packing rings by measuring ease of movement.
Date:
October 2, 1917
Creator:
Holland, Kirk D.
System:
The Portal to Texas History
Display Advertising-Machine.
Patent for an advertising display that carries a number of large advertisement sheets that are revolved and held stationary to periodically display each advertisement in repeating succession.
Date:
October 9, 1917
Creator:
Barnett, John B.
System:
The Portal to Texas History