wired.com —Coleman sold his patent to the Delco Company, which was taken over by General Motors. Charles Kettering, a Delco engineer who joined GM, did some tinkering with Coleman's design and received his own patent for an improved version.
Digg is a place for people to discover and share content from anywhere on the web. Digg surfaces the best stuff as submitted and voted on by the community. Take the Tour to learn more.