In the usual case, the patents will be of different scope, but the manufacture of the item will still require a license from both patent holders. The following, in semi-outline form, is a short introduction of the categories of intellectual property and the aspects which may be protected. The power of copyright is especially effective in preventing the rote copying of a work. By complete, it must have all of the component parts which make up the work. A computer program which does not run and has no utility is a good example of an incomplete project that is not a work.
Direct copying is the easiest form of activity to prevent.
However, the test in copyright is one of substantial similarity. The specifics of such a test is a question of fact to be decided by a jury. From these rights, the license agreement is crafted. License agreements can be as broad and open as any contract and can require a licensee to pay money or perform other duties in exchange for the license. The ability to exclusively perform the work is especially important for playwrights who receive royalties not only from the publication of their plays but also from the performance of their plays.