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1869 - Thomas Edison of Boston, Massachusetts, receives a patent for his electric voting machine.
1869年的今天，马萨诸塞州波士顿市的托马斯·爱迪生接到了电子投票器的专利权。
youdao
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1869 - Thomas Edison of Boston, Massachusetts, receives a patent for his electric voting machine.
1869年的今天，马萨诸塞州波士顿市的托马斯·爱迪生接到了电子投票器的专利权。
youdao