4. Railways
  5. Track layers
  6. Track rail mounted spike driver

David S. Johnsen

Inventor

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Bulk spike loading system

Railways – Track layers – Track rail mounted spike driver
Patent

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Fully automatic, multiple operation rail maintenance apparatus

Railways – Track layers
Patent

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Robotic sod stacker

Earth working – Sod cutter
Reexamination Certificate

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Robotic sod stacker

Earth working – Sod cutter – With means for vertical transverse cutting while moving
Reexamination Certificate

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Profile ID: LFUS-PAI-P-875111

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