4. Earth working
  5. Alternating for right or left hand operation
  6. Axially rotatable implement

Kjell-Egil Stangeland

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Hole opener for the top hole section of oil/gas wells

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Multiple section reversible plough

Earth working – Alternating for right or left hand operation – Axially rotatable implement
Patent

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Plow assembly with turn limiter

Earth working – With wheel steering or actuator for horizontally angling... – Wheel on trailing implement responds to turning movement
Patent

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Pressure control circuit for a combination of a reversible ploug

Earth working – Alternating for right or left hand operation – Tool shifted for opposite throw
Patent

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Reversible Plough

Earth working – Alternating for right or left hand operation – Tool shifted for opposite throw
Patent

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Profile ID: LFUS-PAI-P-191417

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