Judson, and he patented the first zipper in the late 19th century. Here's a brief explanation of why "YKK" is there — and a look at one of the largest zipper companies in the world, which you ...

An curved arrow pointing right. If you look closely at the zipper on your pants right now, odds are that it has 3 letters engraved on the tab: "YKK." But what does it mean? Here's a brief ...