Build a better mousetrap, and the world will beat a path to your door

"Build a better mousetrap, and the world will beat a path to your door" is a phrase attributed to Ralph Waldo Emerson in the late nineteenth century. The phrase is actually a misquotation of the statement:
According to some sources, the current phrasing of the quotation didn't appear until 7 years after Emerson died. Thus, in 1889, Emerson was credited with having said
 rather than 
It is unclear who deserves credit for the phrasing in common use today.
The phrase has turned into a metaphor about the power of innovation and is frequently taken literally, with more than 4,400 patents issued by the United States Patent and Trademark Office for new mousetraps, with thousands more unsuccessful applicants, making them the "most frequently invented device in U.S. history". The popular modern snap-trap version of the mousetrap was invented in Lititz, Pennsylvania, by John Mast in 1899, several years after the Emerson misquote had become popular.