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US Patents

Shrouding apparatus

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

Patent

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Copied from somewhere

Already used for thousands of years

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Bloory idea and bloory practical use

Very broad patent, without practical use

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Patented to preserve knowledge

Defensive patent

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Manufacturing base and used to stop/slow down rivals

Serves only patent trolls

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