Source : Webster's Revised Unabridged Dictionary (1913)

Inventor \In*vent"or\, n. [L.: cf. F. inventeur.]
   One who invents or finds out something new; a contriver;
   especially, one who invents mechanical devices.

Source : WordNet®

inventor
     n : someone who is the first to think of or make something [syn:
          {discoverer}, {artificer}]