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      Scientific American January 20, 1906

      Patents - January 20, 1906

      Trade Marks Designs Copyrights &c

      • January 20, 1906

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      More in the January 20, 1906 issue of Scientific American
      • An Improved Form of Telephone Instrument
      • Floating Depot for Coaling Warships
      • A Chair Designed for the Prevention of Seasickness
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