Mineral concentrators
United States Patent 2717692
US Patent References:
/0213421.html
- - 0213421

/0294157.html
- - 0294157

/0648458.html
- - 0648458

/0694444.html
- - 0694444

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- - 0755016


Inventors:
Harold, Brown
Lamb, William A.
Publication Date:
09/13/1955
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Assignee:
Harold, Brown
Lamb, William A.
Primary Class:
209/19
Other Classes:
209/393, 209/33, 209/288
International Classes:
B07B1/18
US Patent References:
0807659
1185770
Foreign References:
FR983335A