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T A Edison 1stPatent - A black and white photo of a train engine

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Thomas Elba Edison's first patented invention, an Electric Voting Machine.

湯馬士.艾爾巴.愛迪生第一件嘅專利發明品---電氣投票紀錄機。議員只要按檯上面嘅「贊成」或「反對」制,議長就可以睇到票決結果嘅數字。但冇實際用應到。

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patents by thomas alva edison 1869
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Date

1869
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Wikimedia Commons
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http://commons.wikimedia.org/
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public domain

label_outline Explore Patents By Thomas Alva Edison, 1869

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patents by thomas alva edison 1869