Apparatus for treating liquids with gases
United States Patent 1374445

Inventors:
Greenawalt, William E.
Publication Date:
04/12/1921
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Assignee:
Greenawalt, William E.
Primary Class:
261/87
Other Classes:
366/165.200, 366/107, 366/165.300, 209/169, 366/165.400
International Classes:
B03D1/16; B03D1/14