Number | Name | Date | Kind |
---|---|---|---|
4545434 | Higgins | Oct 1985 | |
4657077 | Smith, Jr. et al. | Apr 1987 | |
5390735 | Williamson, Jr. | Feb 1995 | |
5538082 | Zwart | Jul 1996 | |
5865255 | Hammett et al. | Feb 1999 |
Entry |
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Otis Wireline Subsurface Flow Controls & Related Service Equipment Brochure, cover page, pp. 2 and 22 date 1980. |