David Bengt Johan Ankargren

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Kristiansand, NO

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for recuperation of hydraulic energy
- Patent number 9,382,927
- Issue date Jul 5, 2016
- National Oilwell Varco Norway AS
- David Bengt Johan Ankargren
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Heave compensating system
- Patent number 9,267,340
- Issue date Feb 23, 2016
- National Oilwell Varco Norway AS
- David Bengt Johan Ankargren
- B66 - HOISTING LIFTING HAULING
Information Patent Grant
Riser tensioner
- Patent number 9,051,784
- Issue date Jun 9, 2015
- National Oilwell Varco Norway AS
- Christian B. Von Der Ohe
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
HEAVE COMPENSATING SYSTEM
- Publication number 20130312979
- Publication date Nov 28, 2013
- NATIONAL OILWELL VARCO NORWAY AS
- David Bengt Johan Ankargren
- E21 - EARTH DRILLING MINING
Information Patent Application
Apparatus and Method for Recuperation of Hydraulic Energy
- Publication number 20130199168
- Publication date Aug 8, 2013
- NATIONAL OILWELL VARCO NORWAY AS
- David Bengt Johan Ankargren
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL