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US Patents

Nonlinear fiber amplifiers used for a 1430-1530 nm low-loss...

Optical: systems and elements – Optical amplifier – Raman or brillouin process

Reexamination Certificate

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Copied from somewhere

Already used for thousands of years

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It might

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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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