... 6,9 21 37 2 North Carolina 2 ,17 4 50 North Dakota Delaware District of Columbia Florida 3, 11 9 Ohio Georgia 1 , 53 5 Oklahoma Hawaii 96 3, 920 404 62 3, 892 56 3 Oregon 1, 867 Idaho 1, 850 Pennsylvania 3 ,55 5 ... issued patent number 5, 2 31 , 733 on August 3, 19 93 10 11 Patent Attorneys Applying for patents can be tricky! Because of this, an inventor will often hire a patent attorney to help with the process Patent ... Images; Corbis; Corbis; 11 Corbis; 13 Corbis; 14 Corbis, The Granger Collection; 15 Corbis, AP/Wide World; 16 Corbis; 17 ©DK Images; 21 ©DK Images, NASA; 22 NASA ISBN: 0 -32 8 -1 35 3 4-8 Copyright © Pearson...