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United States Patent
1,328,329
Issue Date:
January 20, 1920
Current U.S. Class:
239/416.2
; 137/519; 239/431; 239/571; 431/22; 431/346
Current International Class:
F23D 14/00 (20060101); F23D 14/40 (20060101); F23D 14/42 (20060101)
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