Ajit Pai @AjitPai
OTD in 1904, John Ambrose Fleming got a patent for the vacuum tube. #SCOTUS invalidated it, but the invention was "… https://t.co/GvPHAkhAif — PolitiTweet.org
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Sat Nov 17 04:03:15 +0000 2018
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Ajit Pai @AjitPai
OTD in 1904, John Ambrose Fleming got a patent for the vacuum tube. #SCOTUS invalidated it, but the invention was "… https://t.co/GvPHAkhAif — PolitiTweet.org