Spacing form for soil pipes
United States Patent 2508044
US Patent References:
/1182466.html
- - 1182466

Emplacement former
- - 2202147

Pipe spacing mold
- - 2212974

Emplacement former
- - 2270286


Inventors:
Seddon, Abel L.
Publication Date:
05/16/1950
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Assignee:
Seddon, Abel L.
Primary Class:
249/177
Other Classes:
249/91, 52/220.800
International Classes:
B28B21/74; B28B21/00