Lead line sampler
United States Patent 2140920

Inventors:
Myracle, Alson C.
Publication Date:
12/20/1938
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Assignee:
Myracle, Alson C.
Primary Class:
73/863.860
Other Classes:
137/624.130, 73/863.430
International Classes:
E21B49/08; E21B49/00