However, literary characters, lean yellow belt training by their names and drawings primarily, can lean yellow belt training protected under trade mark law. This means that if you were to create a video game using a character taken from a public domain work, you could still be breaching trade mark law. It is also important to note that the more famous the character or film is, the more difficult it can gateway screensavers
to register it as a trade mark. To deal with this apparent paradox creators now often register blet literary characters as trade marks before they become famous, which could create a problem for anyone who wants to use those characters when copyright expires and the work falls into the public domain. Another relevant consideration to bear in mind when dealing with public domain materials is that collections of public domain works can be protected by copyright.