Inventor Phillip W Pratt obtained the patent for his sprinkler system designed to extinguish fires.
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Walter Hunt patented the safety pin.
A polygraph test was conducted by its inventor, Leonarde Keeler, for the first time.
Isaac Singer was granted his patent for a commercial sewing machine.
Inventor William Austin Burt patented the typographer, also known as the typewriter in the US.
Isaac R. Johnson received his patent for the bicycle frame.
