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Patent applications and USPTO patent grants for Marshall; Ricki Don.The latest application filed is for "steerable earth boring assembly".
Patent | Date |
---|---|
Steerable earth boring assembly Grant 9,970,237 - Davis , et al. May 15, 2 | 2018-05-15 |
Steerable earth boring assembly having flow tube with static seal Grant 9,890,593 - Marshall , et al. February 13, 2 | 2018-02-13 |
Drive shaft for steerable earth boring assembly Grant 9,890,592 - Marshall , et al. February 13, 2 | 2018-02-13 |
Drive Shaft for Steerable Earth Boring Assembly App 20170002609 - Marshall; Ricki Don ;   et al. | 2017-01-05 |
Steerable Earth Boring Assembly App 20170002608 - Davis; Treston Greggory ;   et al. | 2017-01-05 |
Steerable Earth Boring Assembly Having Flow Tube with Static Seal App 20170002610 - Marshall; Ricki Don ;   et al. | 2017-01-05 |
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