Hunton Andrews Kurth LLP -
Jeff C. Dodd, Jonathan D. Reichman and Susanna P. Lichter, Lexology; Copyright in the United States
[Kip Currier: This is a very useful and informative overview of U.S. Copyright law.]
"Can copyrightable works be protected by other IP rights (eg, trademarks and designs)?
Where applicable, copyrightable works can be protected under trademark rights, patent rights and trade secrets.
For example, software can be protected by both patents and copyrights. The copyright would protect the artistic expression of the idea (eg, the software code itself), while the patent would protect the functional expression of the idea (eg, using a single click to purchase something online). An additional example would be a logo for a brand. The logo serves as a trademark indicating that products affixed with the logo are from the same source. The creative and artistic aspects of the logo may also be protected by a copyright. "