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US Patents

[(5,6,9a-Substituted-3-oxo-1,2,9,9a-tetrahy dro-3H-fluoren-7-yl)

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

Patent

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Patented to preserve knowledge

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Manufacturing base and used to stop/slow down rivals

Serves only patent trolls

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