1. 63333 POINTS
    Peggy Mace
    Most of the U.S.
    Patent annuities are fees paid to the United States Patent and Trademark Office three times during 11.5 years, by owners of utility patents. By paying this maintenance fee through patent annuities, patent owners can block their patents from being copied, sold or manufactured by other parties, and from becoming intellectual property of the public.
    Answered on June 6, 2013
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