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5
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
Refrigerator
Patent for a refrigerator made of wood with an inner shell of reinforced concrete and vacuum chamber or metal jacket. "The inner concrete shell is divided into four separate chambers, the former containing ice and the other three being adapted to contain food." (lines 61-64)
Date:
April 11, 1922
Creator:
Knutson, William K.
System:
The Portal to Texas History
Counter.
Patent for improvements to store counters that can be easily constructed in whatever form fits the user.
Date:
July 18, 1922
Creator:
Jones, Laurence E.
System:
The Portal to Texas History
Refrigerator
Patent for improvements for vacuum refrigerators such that cold air circulation and heat exclusion are improved, including illustrations.
Date:
June 27, 1922
Creator:
Knutson, William K.
System:
The Portal to Texas History