What are the four purposes of 35 U.S.C. 101?

According to MPEP 2107.01, 35 U.S.C. 101 has been interpreted as imposing four purposes: Limiting an inventor to ONE patent for a claimed invention Requiring proper inventorship Defining which categories of inventions are eligible for patent protection Ensuring that patents are granted only on inventions that are “useful” The MPEP states: “35 U.S.C. 101 has…

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