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who invented the patent
who invented the patent system
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who invented the potentiometer
who invented the pantry
who invented the pantograph
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john loud invented and patented this pen
color tv invented patent
who invented the color tv patent
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who invented the telephone patent
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who invented the patent, who invented the patent system, who invented the parenting styles, who invented the potentiometer, who invented the pantry, who invented the pantograph, who invented the pants, john loud invented and patented this pen, color tv invented patent, who invented the color tv patent, patent office everything has been invented, who invented the telephone patent, who invented the benz patent motor car