Handy official guide explains functions of the Patent and Trademark Office, describes a patent, defines such terms as "patent pending" and "patent applied for," discusses patent law, explains what can be patented and the process of registering patents, describes filing fees, and much else - all in simple, easy-to-understanding language. Designed specifically for non-attorneys, this indispensable handbook will be of value to inventors, patent applicants, students, and other interested parties.