U.S. Commerce Dept. @CommerceGov
RT @uspto: Can you hear me now? Army vet & @InventorsHOF inductee James West patented the electret microphone in 1962. #AmericanHeroesWeek… — PolitiTweet.org
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Wed Jul 26 22:00:36 +0000 2017
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U.S. Commerce Dept. @CommerceGov
RT @uspto: Can you hear me now? Army vet & @InventorsHOF inductee James West patented the electret microphone in 1962. #AmericanHeroesWeek… — PolitiTweet.org