Inventor · disambiguated record
Charles Frederick Carder
Also filed as: CARDER CHARLES FREDERICK
5 granted patents·5 citations·filing 2010–2013
68Inventor score
Technology areasE21B
Top patents by PatentIndex Score
5 records- 0160US8662180B2Rotational test valve with tension resetRINGGENBERG PAUL DAVID·Filed 2011·Granted Mar 4, 2014·2 cites·16 claims
- 0258US8973663B2Pump through circulating and or safety circulating valveRINGGENBERG PAUL DAVID·Filed 2010·Granted Mar 10, 2015·2 cites·19 claims
- 0355US8607875B2Rotational wellbore test valveRINGGENBERG PAUL DAVID·Filed 2011·Granted Dec 17, 2013·1 cites·10 claims
- 0448US9428990B2Rotational wellbore test valveHALLIBURTON ENERGY SERVICES INC·Filed 2013·Granted Aug 30, 2016·0 cites·9 claims
- 0541US9719325B2Downhole tool consistent fluid controlHALLIBURTON ENERGY SERVICES INC·Filed 2013·Granted Aug 1, 2017·0 cites·21 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →