Law
Intellectual Property Protection for Open Source Software
Quick fact
The MIT License, one of the most popular open-source licenses, uses copyright law to grant everyone permission to use, copy, modify, and distribute the software—while the project's name and logo remain protected as trademarks.
Why this is interesting
You probably think open-source software is free for the taking. But did you know that the creator of Linux can still sue you for using his name?
Read the full explanation
Understanding Intellectual Property Protection for Open Source Software
When you write software, you automatically own the copyright to it—that means you have the exclusive right to copy, modify, and distribute it. Open-source licenses work by using that copyright as a tool: the license is a legal agreement that grants others permission to do things that would otherwise be infringing. For example, the MIT License says, "You can do almost anything with this code, but I'm not liable if it breaks." The GPL (General Public License) goes further: it says you can use the code, but if you distribute a modified version, you must make your changes available under the same license. This creates a legal chain that keeps the code open. Importantly, even with a license, you do not get permission to use the project's name, logo, or other trademarks—those are separate legal protections. And some licenses, like Apache 2.0, also include an explicit patent grant, which protects you from being sued for patent infringement by the code's contributors.
A deeper explanation
The mechanism behind open-source protection is layered. Copyright is the baseline: the moment code is written, it is protected. An open-source license is essentially a copyright license that permits specific uses, and it can impose conditions. Copyleft licenses like the GPL use copyright law to require that derivative works are also licensed under the same terms—this is how they 'infect' downstream projects. If you distribute a modified GPL program, you must grant the same rights to the recipients, or you are violating the license and thus infringing copyright. Trademarks protect the project's identity: using the project's name to promote your own product without permission can mislead users. Patents are a third layer: even if code is freely licensed, a contributor might hold a patent on an algorithm it implements. Permissive licenses like Apache 2.0 include an explicit patent grant, promising that the contributor will not assert their patents against you for your use of the code. Thus, intellectual property protection for open source is not about removing IP rights—it's about using them to create a legal framework that balances openness with control, and that framework is what makes open-source projects sustainable and trustworthy.