4. Electric heating
  5. Metal heating
  6. By arc

Douglas C. Draper

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Laser wax joinery method and apparatus

Electric heating – Metal heating – By arc
Patent

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Method and system for computerized authoring, learning, and...

Education and demonstration – Question or problem eliciting response
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1519765

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