Einar Gjestrum

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Oslo, NO

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Patents Grantslast 30 patents

Information Patent Grant
Float for use in seismic surveys of the sea bed
- Patent number 4,831,599
- Issue date May 16, 1989
- Geophysical Company of Norway A.S.
- Inge Dragsund
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information Patent Grant
Control device for cables with seismic equipment, especially for gu...
- Patent number 4,748,599
- Issue date May 31, 1988
- Geco A.S., Kjorbokollen N-1301
- Einar Gjestrum
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information Patent Grant
Float for use in seismic surveys of the sea bed
- Patent number 4,716,553
- Issue date Dec 29, 1987
- Geophysical Company of Norway A.S.
- Inge Dragsund
- B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
Information Patent Grant
Assembly for use in seismic surveys of the sea bed
- Patent number 4,686,660
- Issue date Aug 11, 1987
- Geophysical Company of Norway A/S
- Einar Gjestrum
- G01 - MEASURING TESTING