Birckhead; John M.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Birckhead; John M..The latest application filed is for "magnetically initiated actuation mechanism".
- Birckhead; John M. - Houston TX
- Birckhead; John M. - Spring TX
| Patent | Date |
|---|---|
| Magnetically Initiated Actuation Mechanism App 20140124266 - Birckhead; John M. ; et al. | 2014-05-08 |
| Magnetically Initiated Actuation Mechanism App 20140043122 - Birckhead; John M. ; et al. | 2014-02-13 |
| Friction spring release mechanism Grant 7,819,198 - Birckhead , et al. October 26, 2 | 2010-10-26 |
| Friction spring release mechanism App 20060249285 - Birckhead; John M. ; et al. | 2006-11-09 |
| Artificial lift apparatus with automated monitoring characteristics Grant 6,536,522 - Birckhead , et al. March 25, 2 | 2003-03-25 |
| Artificial lift apparatus with automated monitoring characteristics App 20020074127 - Birckhead, John M. ; et al. | 2002-06-20 |
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