4. Chain, staple, and horseshoe making
  5. Chain making
  6. Sprocket chain

Donald L. DeVall

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Apparatus for repairing chains

Chain – staple – and horseshoe making – Chain making – Sprocket chain
Patent

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Drill bit

Boring or penetrating the earth – Bit or bit element – Forked rotary nontracking
Reexamination Certificate

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Drill head assembly

Tool driving or impacting – Hammer or tool shaft reciprocated by gripping means which... – With fixed means cyclically contacted by grip structure
Patent

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Drill head assembly

Tool driving or impacting – Processes
Reexamination Certificate

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Drill head assembly

Tool driving or impacting – Work cleansing
Patent

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Profile ID: LFUS-PAI-P-1368756

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