4. Metal working
  5. Method of mechanical manufacture
  6. Electrical device making

Alfredo Lietz

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Method for manufacturing a contact arrangement for a vacuum...

Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate

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Method for producing a contact material for contact pieces...

Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Post sintering operation
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2640384

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