Free access: Patents to be thankful for
During this season of thankfulness in the US, Managing IP thought it was time to remind its readers of some patents of yesteryear, without which life might be a much more thankless experience
The royal flush valve
US patent number: 977,562
Issued: December 6 1910
Inventor: William E Sloan, Chicago, Illinois
Thankful because: Although Queen Elizabeth I and her successors had been using some form of flush toilet for about three centuries, and...
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