U.S. Copyright Office
"To promote the Progress of Science and useful Arts, by securing for limited Times to Authors and Inventors the exclusive Right to their respective Writings and Discoveries."
Quoted from the U.S. Constitution, Article 1, Section 8
U.S. Patent and Trademark Office
Search patent and trademark databases online. Information regarding the patent and trademark.
Photo District News (PDN)
The international publication for the professional photographer.
Actually, this is not a contest, but a place where serious photographers can
apply for artist in residence program. Light Work publishes catalogs
(some may call them books) of exhibition four times a year.
More Art Links
Cool interface. Free portfolio of 5 photos.
PhotoLinks - The Photography Network