国立アメリカ歴史博物館のインスタグラム(amhistorymuseum) - 4月18日 00時13分

Until 1880, if you wanted to patent your invention, you had to make a small, working model of it. Nobody said you had to make it colorful, but why not? This one is a model of a rotary web printing press by Jephtha A. Wilkinson, 1859.
We hope your weekend has been colorful and inventive!
#USPTO #Invention #Innovation #AmericaParticipates @si_invention

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