Ajit Pai @AjitPai
RT @AjitPai: “Revolving Stairs”: OTD in 1859, @USPTO granted to Nathan Ames Patent No. 25,076. The object of his invention was “to enable p… — PolitiTweet.org
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Mon Aug 09 18:40:21 +0000 2021
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Ajit Pai @AjitPai
RT @AjitPai: “Revolving Stairs”: OTD in 1859, @USPTO granted to Nathan Ames Patent No. 25,076. The object of his invention was “to enable p… — PolitiTweet.org