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Waldo Lonsbury Semon (September 10, 1898 – May 26, 1999) was a renowned American inventor born in Demopolis, Alabama. Semon put his name into the history books for inventing vinyl, the world's second most used plastic. He found the formula for vinyl by mixing a few synthetic polymers, and the result was a substance that was elastic, but wasn't adhesive. Semon worked on methods of improving rubber, and eventually developed a synthetic substitute. More information...
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