Intellectual property is designed to help the protection of designs or ideas. For example, lyrics and the design of certain things. You need to have the permission of the owner to copy the ideas or design otherwise it is illegal. The most common type of intellectual property is called copy right.
Copyright law-
The law is when somebody has their work copied or stolen without their permission. It isnt copyright if you state that it isnt your idea/work etc..and if you give credit to the owner. If you do this it is NOT illegal. However, displaying it on the internet or else where and insisting it is your own work is illegal. The copyright law stands for songs, documents, books, names of companies and buisneses.