Open Source Property is a free casebook created by Stephen Clowney, James Grimmelmann, Michael Grynberg, Jeremy Sheff, and Rebecca Tushnet, made reusable under the terms of the Creative Commons Attribution NonCommercial 4.0 International license. This version of the casebook was created by Abraham Bell, based on the original Open Source Property. Most of the new casebook is copied directly from the original casebook; however, the new casebook also edits some of the original and adds entirely new material.