|Charlie and the Chocolate Factory illustration from RoaldDahl.com|
In 1965 an elementary school student wrote to Dahl's literary agent asking for permission for her sixth grade class to put on a play based on Charlie and the Chocolate Factory. The agent's stuffy reply led to a marvelous response by their attorney, who took the case pro bono ("as a matter of principle, and in no snese because my daughter sits in the third row center"). See Re: Charlie and the Chocolate Factory, 14 Green Bag 2d. 171 (2011).
See also Sarah Segal, Note, Keeping It in the Kitchen: An Analysis of Intellectual Property Protection Through Trade Secrets in the Restaurant Industry, 37 Cardozo L. Rev. 1534 (2016), which begins with a discussion of Willy Wonka's fierce protection of his secret recipes.