I do not own the copyright to any of the cartoons at this site. They are provided for your educational use. If you plan to use them, please make sure that you are not violating any copyright laws. This is what I have found on the net about the copyright issues regarding the fair use of published work. If you want more information you can also try The Stanford University Law Site on Fair use.
Although the Fair Use provision is in the Copyright Act, prior to the 1990s, it was seldom invoked outside of academic circles. Until the 2 Live Crew case, Fair Use seemed only to concern itself with making copies for the classroom and using portions of works in academic treatises. The Fair Use provision and the four factors to be considered in a fair use analysis were dramatically fleshed out in the 2 Live Crew case. Here, we look at the fair use provision and the four factors to be used in making a determination of fair use.
§107. Limitations on exclusive rights: Fair Use
The fact that a work is unpublished shall not itself bar a finding of fair
use if such finding is made upon consideration of all the above factors.
This first factor looks at the new work takes into account the following three sub-factors.
The first sub-factor (1) simply looks at the new work and determines whether
it was created primarily as a for profit venture or was created for a non-profit
educational purpose. While not at all determinative, this test indicates that
preference will be granted to works that were created for non-profit educational
purposes (like this Web page!).
This second factor acknowledges that fact that some works are simply more deserving of copyright protection than others. Consequently, this portion of the test looks at the original work and attempts to determine where that work is in the spectrum of worthiness of copyright protection.
The third factor looks at the amount and substantiality of the copying in
relation to the work as a whole. However, the critical determination is whether
the quality and value of the materials used are reasonable in relation to the
purpose of copying. This is not a pure ratio test in that using a whole work may
be fair use in some circumstances, whereas using a tiny fraction of a work not
qualify for fair use in other circumstances.
The fourth factor considers the extent of harm to the market or potential market of the original work caused by the infringement. This test takes into account harm to the original, as well as harm to derivative works.