4. Boring or penetrating the earth
  5. With above-ground means for handling drilling fluid or cutting
  6. Fluid or cuttings directing or receiving means engaging bore...

Goei Co., Ltd.

Corporate Assignee

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Abrasive disc

Abrading – Rigid tool – Rotary disk
Reexamination Certificate

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Cutting apparatus with dust discharging

Abrading – Frame or mount – Portable abrader
Reexamination Certificate

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Deep-hole boring machine and deep-hole boring guide device

Tool driving or impacting – With means to adjust position of axis of tool advance
Reexamination Certificate

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Fluid circulating apparatus for drill

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – Fluid or cuttings directing or receiving means engaging bore...
Reexamination Certificate

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