Number | Date | Country | Kind |
---|---|---|---|
7406259 | May 1974 | SW |
Number | Name | Date | Kind |
---|---|---|---|
3347760 | McKelvie | Oct 1967 | |
3689387 | Jumer | Sep 1972 |
Number | Date | Country |
---|---|---|
703,838 | Feb 1954 | UK |
Entry |
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Electrolytic Polishing by J. S. Crout, Metal Industry, June 8, 1945, pp. 357-359. |