Brief biography of Elijah McCoy and useful bibliography, including many citations to books about African-American inventors. 129,843 is the patent number for McCoy's lubricator. The easiest way to locate McCoy's patent is to use the patent number search feature at the U.S. Patent and Trademark Office. You must first download and install a specific TIFF image plug-in. McCoy is one of six inventors in this book, which includes a glossary, a bibliography, and addresses of several inventors' organizations.
Activities stress the identification of a problem and the forming and testing of hypotheses.