US2402971 Burner
Cited prior art · Mccollum Thelma · United States · 1946
Page 1 Drawing sheet — no readable text. Page 2 Drawing sheet — no readable text. Page 3 Patented July 2, 1946 2,402,971
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US2379018 Heater
Cited prior art · Mccollum Thelma · United States · 1945
Page 1 Drawing sheet — no readable text. Page 2 Drawing sheet — no readable text. Page 3 Drawing sheet — no readable text.