Patent demand letters
Patent demand letters are stressful. Before responding or ignoring, evaluate infringement, patent prosecution history, ownership, and litigation history.
Stephen E. Zweig, PhD JD, Patent Attorney
Patent demand letters are stressful. Before responding or ignoring, evaluate infringement, patent prosecution history, ownership, and litigation history.
Think that someone is infringing on your patent? Worried you are infringing, or want to show a patent reads on prior art? … Read more
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Forget “patent invalid because abstract”, the Planet Blue decision finds the real issue is “preemption.” Non-preemptive software claims are not abstract. In … Read more