For 10 points, name these devices that came to replace most buttons on the flies of pants.
Mike Bentley's History of Technology professor Robert Friedel categorized these devices as "problem seeking" inventions that were popularized because of their novelty rather than utility.  Tadao Yoshida practiced a Carnegie-esque "cycle of goodness" and kick-started his business making these things by buying four US-made chaining machines in 1950.  It's not an impractical compressed-air powered street car, but early versions of these devices were designed by Whitcomb L. Judson.  Their most common name was coined by the B. F. Goodrich Company in a 1923 ad for a new type of (*) galoshes.  It's not velcro, but Gideon Sundback patented an improved version of them that did not use hook-and-eyes for Talon, Inc.  By the 1980s, Talon had lost market share to Japan's YKK.  These devices generally consist of two sets of teeth and a slider.  For 10 points, name these devices that came to replace most buttons on the flies of pants.
Mike Bentley's History of Technology professor Robert Friedel categorized these devices as "problem seeking" inventions that were popularized because of their novelty rather than utility.  
zippers [or zip fastener or zip or fly or clasp locker]