What are the requirements for joint inventors in provisional patent applications?

According to 37 CFR 1.45(c), for provisional applications: Each named inventor must have contributed to the subject matter disclosed in the application. The application is considered a joint application under 35 U.S.C. 116. The MPEP clarifies: Because provisional applications may be filed without claims, 37 CFR 1.45(c) states that each inventor named in a joint…

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