United States Patent 3421569
Inventors:
Neumann, Norbert F.
Publication Date:
01/14/1969
Assignee:
KENNECOTT COPPER CORP
Other Classes:
164/133, 164/450.200, 164/421, 164/95, 164/461
International Classes:
B22D7/02; B22D11/00; B22D7/00; B22D11/02; B22D11/12; B22D19/00
Foreign References:
| DE844806C | | | | |
| DE1138891B | | | | |
| FR1144292A | | | | |