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Margaret E. Knight
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Inventor Margaret E. Knight in her experimenting room Patent No. 220,295: Paper-bag machine
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Margaret E. Knight: Media

American inventor
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Inventor Margaret E. Knight in her experimenting room
“First Woman Granted an American Patent Is Still at Work on Ingenious Inventions,”...
Boston Sunday Post, March 31, 1912 (newspaperarchive.com)
Patent No. 220,295: Paper-bag machine
Figure from Margaret E. Knight's 1879 patent for a paper-bag folding machine.
U.S. Patent and Trademark Office
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