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 Before the Copyright Act of 1976 became effective on 1 Jan 1978, unpublished works were.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.
US copyright law has been modified several times, each time extending the life of copyright protection. This document provides an overview of US copyright law, from the timeline of protection to what is protected. Copyright is a form of intellectual property; the protection is grounded in the U.S. Constitution and granted by law for original works of authorship fixed in a tangible medium of expression.. Both published and unpublished works can be protected.