Grumstrup; Bruce Frederick
Patent Applications and Registrations
Patent applications and USPTO patent grants for Grumstrup; Bruce Frederick.The latest application filed is for "valve positioner with overpressure protection capabilities".
- Grumstrup; Bruce Frederick - Marshalltown IA
| Patent | Date |
|---|---|
| Valve positioner with overpressure protection capabilities Grant 10,007,279 - Grumstrup , et al. June 26, 2 | 2018-06-26 |
| Valve Positioner With Overpressure Protection Capabilities App 20170023954 - Grumstrup; Bruce Frederick ; et al. | 2017-01-26 |
| Valve positioner with overpressure protection capabilities Grant 9,465,391 - Grumstrup , et al. October 11, 2 | 2016-10-11 |
| Valve Positioner With Overpressure Protection Capabilities App 20150192931 - Grumstrup; Bruce Frederick ; et al. | 2015-07-09 |
| Methods and apparatus for bypassing a positioner in an active control loop Grant 8,910,665 - Carter , et al. December 16, 2 | 2014-12-16 |
| Automatic valve seating integrity test Grant 8,421,643 - Grumstrup April 16, 2 | 2013-04-16 |
| Methods And Apparatus For Bypassing A Positioner In An Active Control Loop App 20120216898 - Carter; Perry Keith ; et al. | 2012-08-30 |
| Flow measurement module and method Grant 6,725,167 - Grumstrup , et al. April 20, 2 | 2004-04-20 |
| Flow measurement module and method App 20030135335 - Grumstrup, Bruce Frederick ; et al. | 2003-07-17 |
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