On his blog, Sebastian Kügler gathers some tips on writing defensive publications
. These publications are a weapon
that can be used to ensure that techniques used by free software don't get patented by others. "A defensive publication is a technical document that describes ideas, methods or inventions and is a form of explicit prior art. Defensive publications are published by Open Invention Network in a database that is searched by patent offices during a patent exam. A good defensive publication will prevent software patents from being granted on ideas that are not new and inventive.These will help protect your freedom to operate.
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