Category:1794 patents

Media in category "1794 patents"

The following 2 files are in this category, out of 2 total.

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  Patent for Cotton Gin (1794) - hi res.jpg 2,293 × 3,133; 4.11 MB
  
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  US Patent Drawings - unknown, Fender Broadcaster (1951), Tupperware (1954), Yo-yo (1866), Lego brick (1961), Edison light bulb (1880), Eli Whitney's cotton gin (1794), iPod (2008) - National Museum of American History (2015-10-13 by Kazuhisa OTSUBO).jpg 1,080 × 722; 59 KB