What is the significance of common assignee in patent applications?
Common assignee in patent applications refers to when a reference patent or application publication and the current application are owned by the same entity. However, this common ownership does not automatically negate the need for certain legal procedures. As stated in MPEP 715.01(b):
The mere fact that the reference patent or application publication which shows but does not claim certain subject matter and the application which claims it are owned by the same assignee does not avoid the necessity of filing an affidavit or declaration under 37 CFR 1.131(a), in the absence of a showing under 37 CFR 1.132 that the patentee derived (in the context of pre-AIA law) the subject matter relied on from the inventor (MPEP § 716.10).
This means that even with common ownership, inventors may still need to provide evidence of prior invention or derivation in certain circumstances.
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