Midwest Book Review : Professional patent drafters charge hundreds of dollars to prepare patent drawings. The Patent Drawing Book shows how to complete a crucial step in the patenting process -- the creation of formal patent drawings that comply with the strict rules of the U. S. Patent and Trademark Office. You can also use the drawings to market and promote your product to prospective manufacturers and customers. This invaluable book also teaches the basics of technical drafting using pen and ruler, computer automated drawing programs, and photographic techniques. . . .