Co-Inventor

In patent law, an inventor is the person, or persons in United States patent law, who contribute to the claims of a patentable invention. In some patent law frameworks, however, such as in the European Patent Convention and its case law, no explicit, accurate definition of who exactly is an inventor is provided. The definition may slightly vary from one European country to another. Inventorship is generally not considered to be a patentability criterion under European patent law. Under U.S. case law, an inventor is the one with "intellectual domination" over the inventive process, and not merely one who assists in its reduction to practice. Since inventorship relates to the claims in a patent application, knowing who an inventor is under the patent law is sometimes difficult. In fact, inventorship can change during the prosecution of a patent application as claims are deleted or amended.

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