Valved catch basin
United States Patent 2796988
US Patent References:
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/0185017.html
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/0223624.html
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/0244425.html
- - 0244425
/0604117.html
- - 0604117
/0647739.html
- - 0647739
Inventors:
Walther, Loffler
Publication Date:
06/25/1957
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Assignee:
Walther, Loffler
Primary Class:
Other Classes:
210/318, 210/307, 137/583, 210/163, 137/614.200
International Classes:
E03F5/042; E03F5/04
US Patent References:
Foreign References:
| DE250569C | ||||
| DE599834C |