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| US4883388 | 8 Abr 1987 | 28 Nov 1989 | | Load compensating system | | US4886397 | 27 Ago 1987 | 12 Dic 1989 | | Dynamic load compensating system | | US5269629 | 29 Jul 1991 | 14 Dic 1993 | Shell Oil Company | Elastomeric swivel support assembly for catenary riser | | US5673804 | 20 Dic 1996 | 7 Oct 1997 | PRI Automation, Inc. | Hoist system having triangular tension members | | US6360822 | 7 Jul 2000 | 26 Mar 2002 | ABB Vetco Gray, Inc. | Casing annulus monitoring apparatus and method |
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