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What year was Oxygen discover and how?
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When and who invented the Radio Telegraphy ?
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Which company is ahead in Electronic Computer innovations?
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When and who invented the Bakelite?
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Which company is ahead in Microscope (Electron) innovations?
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Who invented the Diesel Engine?
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What year was Sewing Machine invented and how?
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Who invented the Food Frozen?
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Which company is ahead in Streetcar (electric) innovations?
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When and who invented the Transformer (induction coil)?
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When and who invented the Adding Machine?
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Which company is ahead in Launderette innovations?
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