Suction head
United States Patent 2527110
US Patent References:
/0771254.html
- - 0771254

/1111304.html
- - 1111304

Ventilating apparatus for toilet hoppers
- - 2380891


Inventors:
Dona, Wheeler
Publication Date:
10/24/1950
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Assignee:
Dona, Wheeler
Primary Class:
4/217
International Classes:
A47K13/12; E03D9/052; A47K13/00; E03D9/04