When was the modern windmill invented?

Question

The ones that generate power! Sources as well please!!

Answer 1

visit the following link and for any of your needs wikipedia will be having an answer. I tell it from my experience

Answer 2

For resources, go to Mother Earth News, NASA, GE, and the Library of Congress. The modern windmills were of initial interest back in the early to mid 60's. To a varying degree, interest has grown and waned ever since then.