FUN FACT: The doorknob was not invented until 1878, when Osbourn Dorsey filed a patent for a “Door Holding Device.”
http://www.google.com/patents/US210764?dq=patent:210764
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FUN FACT: The doorknob was not invented until 1878, when Osbourn Dorsey filed a patent for a “Door Holding Device.”
http://www.google.com/patents/US210764?dq=patent:210764
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