The Patents of Nikola Tesla Patent number 335,787 Electric Arc Lamp --v2.0?--

in #tesla • 7 years ago

![pt335787 p1.png](https://steemitimages.com/DQmcj7iARDGxX1U571dsbzM5JCbqdtgaXfZutortKrNUQ9k
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#patents #steem
7 years ago in #tesla by
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     6 years ago 

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       5 years ago 

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