What factors do courts consider in determining if an invention was offered for sale primarily for experimentation?

Courts consider several factors to determine if a claimed invention was offered for sale primarily for experimentation. According to MPEP 2133.03(e)(4), these factors include: “(1) the necessity for public testing, (2) the amount of control over the experiment retained by the inventor, (3) the nature of the invention, (4) the length of the test period,…

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