Chris Ledgard looks at the global war over intellectual property. 1/5: My Idea. Most scientists and inventors protect their work with patents, but does this benefit society?

Chris Ledgard looks at the global war over intellectual property. 2/5: My Name. Trademarks have to be protected, but should anyone be allowed to trademark a colour or a phrase?

Chris Ledgard looks at the global war over intellectual property. 3/5: My Music. The music industry has been revolutionised by the internet explosion.

Chris Ledgard looks at the global war over intellectual property. 4/5: My Pictures. Anyone with a broadband computer can now download and watch virtually any movie free of charge.

Chris Ledgard looks at the global war over intellectual property. 5/5: My Words. Plagiarism has become a nightmare for teachers, publishers and journalists.