- Many different forms and media can be copyrighted, including textual works, sound recordings, music scores, software, moving pictures, and more.
- Ideas, facts, slogans, and useful objects cannot be copyrighted.
- There is no need to register the copyright or to provide notice (the c in the circle).
- Nevertheless, these formalities do have some benefits. Registration is necessary before a copyright owner can litigate for copyright infringement. Providing notice lets the world know that the owner holds the copyright and will protect it.
- Of reproduction
- To prepare derivative works
- Of distribution
- Of public performance
- Of display
- Of performance through digital audio transmission
Throughout twentieth century, Congress extended the duration of copyright. When a work by an individual author is published in the U.S. today, the copyright term is 70 years plus the life of the author. For a work of corporate authorship, the copyright term is 95 years from publication or 120 years from the date when the work was created, whichever is shorter.
- See Copyright Term and Public Domain in the United States for a more detailed look at copyright terms, their requirements, and their expirations.