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US Patents

Garage door mounted light

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Plural periodic switches or multiple contact periodic switch

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

What is the true purpose of this patent? - Does this patent serve only to stop other inventors persuing an idea, or it is patented to solve a specific problem?

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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