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US Patents

Voltage-regulated supply, notably for microwave tubes

Electric lamp and discharge devices: systems – Plural power supplies – Condenser in one of the supply circuits

Patent

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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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