4. Metallurgical apparatus
  5. Means for melting or vaporizing metal or treating liquefied...
  6. By providing, treating or protecting environment, e.g., vacuum

Young-Sik Shin

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Degassing apparatus having duplex vacuum vessel

Metallurgical apparatus – Means for melting or vaporizing metal or treating liquefied... – By providing – treating or protecting environment – e.g. – vacuum
Reexamination Certificate

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Method for message exchanging service between residential...

Telecommunications – Radiotelephone system – Auxiliary data signaling
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System and method for visitor reception service in absence

Telephonic communications – Telephone line or system combined with diverse electrical... – Remote control
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2216533

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