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US Patents

Method and apparatus for simulating cross-correlation coefficien

Education and demonstration – Detection or range determination of distant object by... – Sonar

Patent

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How useful is this invention? - Does humanity need patent for this invention?

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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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