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Spark Plug.
Patent for a spark plug with the capacity to afford an intense spark, prevent leakage of current, and to preclude fouling of the plug in carbon.
Date:
October 24, 1922
Creator:
Bronson, Fred L.
System:
The Portal to Texas History
Electric Battery
Patent for an electric battery. This battery is designed to be more efficient and run for a longer time, without adding water.
Date:
October 24, 1922
Creator:
Holmes, Frank M.
System:
The Portal to Texas History