A crescent wrench, which is sometimes called a “monkey wrench.” (Tools can be confusing.) | Peter Dazeley/GettyImages Almost as confusing as the monkey wrench label is arriving on who deserves ...

The crescent wrench. | Laurent Hamels/GettyImages By 1910, the wrench was being advertised in newspapers. Peterson applied for and received a patent in 1915, which was accompanied by the following ...