Who Invented the Doorknob?

Answer

African American inventor Osbourn Dorsey invented the first doorknob in 1878. While others had made similar inventions, Dorsey was the first to patent the idea.
1 Additional Answer
The first documented invention of the doorknob appears in U.S. Patent entries for the year 1878 by an African American inventor named Osbourn Dorsey.
Q&A Related to "Who Invented the Doorknob?"
It's actually unknown for certain who invented the doorknob. But, the first documentation of the invention came in 1878 in the U.S. Patent Office when a submission was made for improvements
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it was invented in a home when a man could not open his door, so he took a piece of would carved it into a round shape, and nailed it in his door.
http://wiki.answers.com/Q/Where_was_the_doorknob_i...
A man named Osbourn Dorsey has the first recorded patent for improvements on a
http://www.chacha.com/question/when-were-doorknobs...
The doorknob was invented by Osbourn Dorsey in 1878. Thanks to him, we can get in and out of places!
http://www.kgbanswers.com/who-invented-doorknobs/4...
Explore this Topic
It's actually unknown for certain who invented the doorknob. But, the first documentation of the invention came in 1878 in the U.S. Patent Office when a submission ...
It's actually unknown for certain who invented the doorknob. But, the first documentation of the invention came in 1878 in the U.S. Patent Office when a submission ...
It's actually unknown for certain who invented the doorknob. But, the first documentation of the invention came in 1878 in the U.S. Patent Office when a submission ...
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