Radon is a dangerous gas. It is colorless and odorless and is always being emitted from our planet-don't worry, it's not enough to harm you.
Copyright for published works in the USA has been according to a federal copyright statute, since the first U.S. copyright statute in the year 1790. Before the Copyright Act of 1976 became effective on 1 Jan 1978, unpublished works were. protected by state law, known as common-law copyright.
1 COPYRIGHT LAW. 2  Copyright law protects the creators of expressive works, such as artists, photographers, writers, and musicians, and gives them the exclusive right to protect how their works are used. 3  It is important to note that, unlike trademark law, copyright law does not protect names or titles. Patent law protects inventions. 2  By filing and obtaining a patent from the United States Patent and Trademark Office, the inventor of a product receives a monopoly on the commercial exploitation and use of a product for up to 20 years.