4. Excavating
  5. Digging edge
  6. Tooth or adaptor

John H. Walgren

Inventor

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Chain for trencher apparatus

Excavating – Digging edge – Tooth or adaptor
Patent

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Cutting chain

Excavating – Ditcher – Having endless digger
Reexamination Certificate

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Cutting tooth for a trencher chain

Excavating – Endless digger – Digging chain – bucket – blade – or tooth structure – per se
Reexamination Certificate

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Cutting tooth for a trencher chain

Excavating – Ditcher – Having endless digger
Patent

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Profile ID: LFUS-PAI-P-786544

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