Koester; David John
Patent Applications and Registrations
Patent applications and USPTO patent grants for Koester; David John.The latest application filed is for "fluid valve apparatus having enclosed seals".
- Koester; David John - Marshalltown IA
- Koester; David John - Gladbrook IA
| Patent | Date |
|---|---|
| Flexible seals for process control valves Grant 9,587,747 - Helfer , et al. March 7, 2 | 2017-03-07 |
| Fluid Valve Apparatus Having Enclosed Seals App 20160238149 - Koester; David John | 2016-08-18 |
| Fluid valve apparatus having enclosed seals Grant 9,400,061 - Koester July 26, 2 | 2016-07-26 |
| Flexible Seals For Process Control Valves App 20150369371 - Helfer; Wade Jonathon ; et al. | 2015-12-24 |
| Flexible seals for process control valves Grant 9,127,775 - Helfer , et al. September 8, 2 | 2015-09-08 |
| Fluid Valve Apparatus Having Enclosed Seals App 20150028242 - Koester; David John | 2015-01-29 |
| Flexible Seals For Process Control Valves App 20120319022 - Helfer; Wade Jonathon ; et al. | 2012-12-20 |
| Flexible seals for process control valves Grant 8,286,938 - Helfer , et al. October 16, 2 | 2012-10-16 |
| Packing nut for control valve Grant 7,980,530 - Mahncke , et al. July 19, 2 | 2011-07-19 |
| Fluid flow control valve with high temperature bi-directional shutoff Grant 7,484,710 - Koester , et al. February 3, 2 | 2009-02-03 |
| Universal fluid valve body Grant 7,469,708 - Koester December 30, 2 | 2008-12-30 |
| Flexible Seats For Process Control Valves App 20070215834 - Helfer; Wade Jonathan ; et al. | 2007-09-20 |
| Integrated post-guided seat ring assembly Grant 7,077,384 - Koester July 18, 2 | 2006-07-18 |
| Universal fluid valve body App 20060130899 - Koester; David John | 2006-06-22 |
| Fluid flow control valve with bi-directional shutoff Grant 6,974,121 - Koester , et al. December 13, 2 | 2005-12-13 |
| Fluid flow control valve with bi-directional shutoff App 20030178595 - Koester, David John ; et al. | 2003-09-25 |
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