POLISHING APPARATUS
United States Patent 3504457

Inventors:
Jacobsen, Hans R.
Jensen, Elmer W.
Publication Date:
04/07/1970
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Assignee:
GEOSCIENCE INSTR CORP
Primary Class:
451/288
Other Classes:
451/533, 257/E21.237
International Classes:
B24B37/04; B24D7/02; H01L21/304; B24D7/00; H01L21/02; B24B29/00; B24B11/00; B24B5/00
US Patent References:
0671130
0804853
1923719Stropping material
2650158Scouring implement
Foreign References:
CA681832A




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