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Canadian Patents

Magneto-optic bi.sub.1 lu.sub.2 fe.sub.5 o in12 xx crystals

C - Chemistry – Metallurgy – 30 – B

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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