Electrical pioneer whose last known U.S. patent was for a helicopter-plane crossword clue
Let me guess, you have been playing a crossword game and got stuck on the clue Electrical pioneer whose last known U.S. patent was for a helicopter-plane.
Well, you have come to the right place to find the answer to this clue.
Electrical pioneer whose last known U.S. patent was for a helicopter-plane crossword clue