The Defensive Patent License (DPL) is a patent license proposed by Jason Schultz and Jennifer Urban, directors of the Samuelson Law, Technology & Public Policy Clinic at the University of California, Berkeley as a patent licensing equivalent of the GPL copyright license.
[4] DPL participants remain free to launch patent lawsuits against non-participants.
DPL 1.0[5] was published on November 16, 2013, and a "birthday" celebration held at the Internet Archive.
[6] The Internet Archive was designated as the fiscal umbrella organization until it has its own non-profit entity.
It was launched on February 28, 2014 at a conference in Berkeley.