4. Electric heating
  5. Inductive heating
  6. Specific heating application

J. Jay Haugen

Attorney

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Guide rail system for a telescoping mast on a drilling rig

Boring or penetrating the earth – With above-ground means to advance or retract boring means
Reexamination Certificate

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Hydraulic interference knives for a vertical auger mixer

Agitating – Stirrer within stationary mixing chamber – Rotatable stirrer
Reexamination Certificate

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Induction heating apparatus for controlling the welding...

Electric heating – Inductive heating – Metal working
Reexamination Certificate

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Induction heating apparatus for heat treating a section of pipe

Electric heating – Inductive heating – Specific heating application
Reexamination Certificate

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Pipe handling apparatus for presenting sections of pipe to a...

Material or article handling – Well pipe or rod racking mechanism – With slope change
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Profile ID: LFUS-PAI-P-2225537

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