What are the statutory categories for patentable inventions under 35 U.S.C. 101?

According to 35 U.S.C. 101, there are four statutory categories for patentable inventions:

  • Process
  • Machine
  • Manufacture
  • Composition of matter

The MPEP directly quotes the statute: “Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title.” These categories define the types of inventions that are eligible for patent protection under U.S. law.

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Topics: MPEP 2100 - Patentability, MPEP 2104 - Requirements Of 35 U.S.C. 101, Patent Law, Patent Procedure
Tags: 35 u.s.c. 101, Patent Eligibility, Patentable Inventions, statutory categories