JAHNKE; Douglas
Patent Applications and Registrations
Patent applications and USPTO patent grants for JAHNKE; Douglas.The latest application filed is for "rotary control device with self-contained hydraulic reservoir".
- JAHNKE; Douglas - Hockley TX
- Jahnke; Douglas - Houston TX
| Patent | Date |
|---|---|
| Rotary Control Device with Self-Contained Hydraulic Reservoir App 20210340834 - TRAN; Lap Tan ; et al. | 2021-11-04 |
| Pipe union assembly Grant 10,895,337 - Jahnke January 19, 2 | 2021-01-19 |
| Cylinder liner retainer system with torque multiplier and method Grant 10,436,193 - Jahnke O | 2019-10-08 |
| Epicyclic washpipe swivel cartridge and method Grant 10,408,328 - Jahnke Sept | 2019-09-10 |
| Pipe Union Assembly App 20180356015 - JAHNKE; Douglas | 2018-12-13 |
| Quick change cylindrical liner retainer assembly Grant 10,041,490 - Jahnke August 7, 2 | 2018-08-07 |
| Quick release piston rod assembly Grant 10,036,384 - Jahnke July 31, 2 | 2018-07-31 |
| Contoured ram bore on type U blowout preventer Grant 9,506,313 - Jahnke November 29, 2 | 2016-11-29 |
| Contoured Ram Bore On Type U Blowout Preventer App 20140034293 - Jahnke; Douglas | 2014-02-06 |
| Blowout preventer with shearing blades Grant 8,443,880 - Jahnke May 21, 2 | 2013-05-21 |
| Blowout preventer with shearing blades Grant 8,443,879 - Jahnke May 21, 2 | 2013-05-21 |
| Blowout Preventer With Shearing Blades And Method App 20130119283 - JAHNKE; Douglas | 2013-05-16 |
| Blowout Preventer With Shearing Blades And Method App 20120168651 - JAHNKE; Douglas | 2012-07-05 |
| Blowout preventer with shearing blades Grant 8,167,031 - Jahnke May 1, 2 | 2012-05-01 |
| Blowout preventer with shearing blades Grant 8,162,046 - Jahnke April 24, 2 | 2012-04-24 |
| Blowout Preventer With Shearing Blades And Method App 20120043083 - JAHNKE; Douglas | 2012-02-23 |
| Blowout Preventer With Shearing Blades And Method App 20120043068 - JAHNKE; Douglas | 2012-02-23 |
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