4. Metal treatment
  5. Stock
  6. Containing over 50 per cent metal, but no base metal

John P. Nielsen

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Method of sulfide tarnish inhibiting of silver-copper, silver-go

Alloys or metallic compositions – Silver base – Copper containing
Patent

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Nobleization of beta brass

Metal treatment – Stock – Containing over 50 per cent metal – but no base metal
Patent

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Profile ID: LFUS-PAI-P-830060

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