The Invention Dimension, sponsored by the Lemelson-MIT awards program, offers a wealth of information about famous (and not-so-famous) inventors and their creations. Meet the inventor of the week. Browse the archives to learn the stories behind devices ranging from the zipper and Crayola crayons to the heart pacemaker. Have an idea of your own? Would-be Edisons can check out the site's Handbook for Inventors to obtain information on patents, intellectual property issues, and other topics.