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News and links on inven­tions and inventors

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The Engines of Our Inge­nu­ity radio pro­gram host­ed by John Lien­hard [com­plete archive, text and audio]”>United States Patent and Trade­mark Office

First published on February 19th, 2009 at 4:13 pm (EST) and last modified on February 20th, 2009 at 12:54 pm (EST).

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