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Canadian Patents

11,17.alpha.,21-trihydroxy-9.beta.,10.alpha.-pregn-4-en-3,20...

C - Chemistry – Metallurgy – 07 – J

Patent

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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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