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Patent applications and USPTO patent grants for Jancha; Robert.The latest application filed is for "subsurface safety valve flapper".
Patent | Date |
---|---|
Subsurface safety valve flapper Grant 8,701,781 - Henschel , et al. April 22, 2 | 2014-04-22 |
Subsurface Safety Valve Flapper App 20120111575 - Henschel; Robert C. ;   et al. | 2012-05-10 |
Subsurface Safety Valve Flapper App 20110114335 - Henschel; Robert C. ;   et al. | 2011-05-19 |
Safety valve torsional spring assembly and method Grant 7,798,235 - Mondelli , et al. September 21, 2 | 2010-09-21 |
Subsurface Safety Valve Flapper App 20100175887 - Henschel; Robert C. ;   et al. | 2010-07-15 |
Safety Valve Torsional Spring Assembly And Method App 20090242209 - Mondelli; Maximiliano ;   et al. | 2009-10-01 |
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