United States Patent 2785109
Inventors:
Schwalge, William C.
Publication Date:
03/12/1957
Assignee:
Schwalge, William C.
Other Classes:
210/483, 196/128, 123/196A, 210/442, 210/295, 210/180, 210/285
International Classes:
B01D27/02; B01D35/18; F16N39/00; B01D27/00; B01D35/00