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United States Patent 2712864
US Patent References:
/0928469.html
- - 0928469

/1047097.html
- - 1047097


Inventors:
Clevett Jr., Merton L.
Publication Date:
07/12/1955
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Assignee:
Clevett Jr., Merton L.
Primary Class:
52/163
Other Classes:
135/118, 52/166, D30/154, D21/840
International Classes:
E02D5/80
Foreign References:
GB309872A