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United States Patent 2200948
Inventors:
Griffiths, Bufton Hubert
Publication Date:
05/14/1940
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Download PDF 2200948
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Assignee:
Griffiths, Bufton Hubert
Primary Class:
47/41.120
Other Classes:
428/10, D11/130
International Classes:
A01G5/04
;
A01G5/00