Holgate; Ben Calvin
Patent Applications and Registrations
Patent applications and USPTO patent grants for Holgate; Ben Calvin.The latest application filed is for "true position indicator".
- Holgate; Ben Calvin - Pearland TX
- Holgate; Ben Calvin - Houston TX
| Patent | Date |
|---|---|
| Selector valve for high pressure hydrocarbon production operations Grant 9,909,386 - McEvoy , et al. March 6, 2 | 2018-03-06 |
| Non-parallel multi-bore sealing device Grant 9,790,765 - Cheatham , et al. October 17, 2 | 2017-10-17 |
| True Position Indicator App 20170130577 - Cheng; Samuel Heung Yeung ; et al. | 2017-05-11 |
| Non-Parallel Multi-Bore Sealing Device App 20160097251 - Cheatham; Lloyd Ray ; et al. | 2016-04-07 |
| Valve body filtration system Grant 9,261,196 - McEvoy , et al. February 16, 2 | 2016-02-16 |
| Non-welded hardface gate and seats Grant 9,249,888 - McEvoy , et al. February 2, 2 | 2016-02-02 |
| Power boost assist closed device for actuators Grant 9,194,509 - Adams , et al. November 24, 2 | 2015-11-24 |
| Selector Valve for High Pressure Hydrocarbon Production Operations App 20150267505 - McEvoy; Travis Kyle ; et al. | 2015-09-24 |
| Non-Welded Hardface Gate and Seats App 20150204448 - McEvoy; Travis Kyle ; et al. | 2015-07-23 |
| A Valve Body Filtration System App 20150167851 - McEvoy; Travis Kyle ; et al. | 2015-06-18 |
| Power Boost Assist Closed Device For Actuators App 20150076377 - Adams; Keith ; et al. | 2015-03-19 |
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