Zebco is the push-button fishing reel your dad handed you. Its maker, the Zero Hour Bomb Company, made oil-well bombs - until its patents ran out. In 1947, Texas watchmaker R.D. Hull brought a fix: a board of nails and a coffee-can lid, an idea from a grocery clerk pulling string off a spool. It worked, and the bomb company renamed itself Zebco: ZEro hour Bomb COmpany. Someone is still handing one to a kid right now.