U.S. Commerce Dept. @CommerceGov
RT @TodaysDocument: Patent Drawing for H. W. Barker’s Drug Mixer, patented at @uspto 125 years ago #OTD 5/9/1893: https://t.co/FjCgJVW8Wk h… — PolitiTweet.org
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Wed May 09 13:37:05 +0000 2018
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U.S. Commerce Dept. @CommerceGov
RT @TodaysDocument: Patent Drawing for H. W. Barker’s Drug Mixer, patented at @uspto 125 years ago #OTD 5/9/1893: https://t.co/FjCgJVW8Wk h… — PolitiTweet.org