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Patentleft is the practice of licensing patents (especially biological patents) for royalty-free use, on the condition that adopters license related improvements they develop under the same terms. Copyleft-style licensors seek "continuous growth of a universally accessible technology commons" from which they, and others, will benefit.

Patentleft is analogous to copyleft, a license that allows distribution of a copyrighted work and derived works, but only under the same or equivalent terms.

Uses

The Biological Innovation for Open Society (BiOS) project implemented a patentleft system to encourage re-contribution and collaborative innovation of their technology. BiOS holds patented technology for transferring genes in plants, and licenses the technology under the terms that, if a license holder improves the gene transfer tool and patents the improvement, then their improvement must be made available to all the other license holders.

The open patent idea is designed to be practiced by consortia of research-oriented companies and increasingly by standards bodies. These also commonly use open trademark methods to ensure some compliance with a suite of compatibility tests, e.g. Java, X/Open both of which forbid the use of the mark by the non-compliant.

On October 12, 2001 the Free Software Foundation and Finite State Machine Labs Inc. (FSMLabs) announced a GPL-compliant open-patent license for FSMLabs' software patent, US 5995745 . Titled the Open RTLinux patent license Version 2, it provides for usage of this patent in accordance with the GPL.

See also

• Copyleft
• Gratis versus libre
• Open content
• Open Invention Network
• Open Patent Alliance
• Open source
• Patent troll
• Public domain
• Software patent
• Viral license

References

1. Hope, Janet (2008). The Red Book of Varieties and Schemes. Lecture Notes in Mathematics. Vol. 1358. Harvard University Press. pp. 176–187. doi:10.1007/b62130. ISBN 978-0-674-02635-3.
2. Open Patent license proposal at openpatents.org
3. John T. Wilbanks and Thomas J. Wilbanks, "Science, Open Communication and Sustainable Development", 13 April 2010, ""
4. Cambia Biosciences Initiative
5. FSF/FSMLabs press release for the RTLinux Open Patent License, October 12, 2001.

Further reading

• Ménage, Guillaume; Dietrich, Yann (March 2010). ""Patent Left"" (PDF). Les Nouvelles. Licensing Executives Society International: 42–46. Archived from the original (PDF) on July 16, 2011. Retrieved November 30, 2010.
• Richard Stallman (June 22, 1999). "On "Free Hardware"". — Richard Stallman criticizes patentleft because of cost of applying for patents

External links

• https://wiki.p2pfoundation.net/Patentleft
• Open Hardware Licenses
• Standardized Terms and Conditions For Open Patenting
• Find Biological Parents

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