These 5 general pattern images were copied from the NIST website:
http://www.nist.gov/srd/fing_img.cfm
(arch_h_2.jpg, l_loop_h_1.jpg, r_loop_h_1.jpg, t_arch_h_2.jpg, whorl_h_1.jpg)

These images, as per the NIST's "license", are in the public domain.
Quoting http://www.nist.gov/public_affairs/disclaimer.cfm
"Use of NIST Information

These World Wide Web pages are provided as a public service by the National Institute of Standards and Technology (NIST). With the exception of material marked as copyrighted, information presented on these pages is considered public information and may be distributed or copied. Use of appropriate byline/photo/image credits is requested."
