Number | Date | Country | Kind |
---|---|---|---|
50-64950 | May 1975 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2892218 | McGhee et al. | Jun 1959 | |
2965931 | Alden et al. | Dec 1960 | |
3104159 | Davidson | Sep 1973 | |
3329751 | Slicker et al. | Jul 1967 | |
3991170 | Singer | Nov 1976 |
Entry |
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Spencer, SPE Journal, Jul. 1962, pp. 774-779. |