Number | Date | Country | Kind |
---|---|---|---|
77 01288 | Jan 1977 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3169500 | Cousteau et al. | Feb 1965 | |
3812922 | Stechler | May 1974 | |
4010560 | Diggs | Mar 1977 | |
4035022 | Hahlbrock et al. | Jul 1977 |
Number | Date | Country |
---|---|---|
2089926 | Jan 1972 | FRX |
Entry |
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Lockwood, George S., "Engineering Aspects of Mineral Recovery from the Ocean Floor"; Mining Engineering, Aug., 1964; pp. 45-49. |