How does prior publication affect joint inventorship?

Prior publication of a joint inventor’s contribution does not necessarily negate joint inventorship. The MPEP cites the case Dana-Farber Cancer Inst., Inc. v. Ono Pharm. Co., which states: “[A] collaborative enterprise is not negated by a joint inventor disclosing ideas less than the total invention to others, especially when, as here, the collaborators had worked…

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