All Patents in class 261/28


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All Patents in class 261/28
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
138,409	Apr. 29, 1873	T. Judd, E. Doty	Improvement in apparatus for carbureting air
724,972	Apr. 07, 1903	R.D. Tomlinson	Condenser	steam condensers
1,782,928	Nov. 25, 1930	J.S. Knowlson	Humidifier	air conditioning apparatus