Assignee
JAHNKE DOUGLAS
US·5 granted patents·46 citations·filing 2011–2013
Technology mixE21B5
Top patents by PatentIndex Score
5 records- 0191US8162046B2Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2011·Granted Apr 24, 2012·13 cites·29 claims
- 0290US8443880B1Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2013·Granted May 21, 2013·11 cites·47 claims
- 0387US8443879B2Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2012·Granted May 21, 2013·8 cites·34 claims
- 0487US8167031B2Blowout preventer with shearing bladesJAHNKE DOUGLAS·Filed 2011·Granted May 1, 2012·9 cites·16 claims
- 0575US9506313B2Contoured ram bore on type U blowout preventerJAHNKE DOUGLAS·Filed 2012·Granted Nov 29, 2016·5 cites·21 claims
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