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US Patents

3-Oxo-pregna-4,17(20)-dien-20-carboxylic acid and esters

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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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