Can a patent undergo multiple reexaminations?
Yes, a patent can undergo multiple reexaminations. This is evident from the concept of “reexamination of a reexamination” discussed in MPEP § 2695. The section states: “…a reexamination request filed on a patent for which a reexamination certificate has already issued, or a reexamination certificate issues on a prior reexamination, while the new reexamination is…
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