Source : Webster's Revised Unabridged Dictionary (1913)

Patent \Pat"ent\, v. t. [imp. & p. p. {Patented}; p. pr. & vb.
   n. {Patenting}.]
   To grant by patent; to make the subject of a patent; to
   secure or protect by patent; as, to patent an invention; to
   patent public lands.

Source : WordNet®

patented
     adj : (of devices and processes) protected by patent; "they are
           patented inventions"