Conversation so far:
What did Paul Winchell do medically?
He developed over 30 patents in his lifetime.
What were some of Paul Winchell's patents?
He invented an artificial heart with the assistance of Dr. Henry Heimlich.
Who was Jarvik?
Robert Koffler Jarvik, M.D. (born May 11, 1946) is an American scientist, researcher and entrepreneur known for his role in developing the Jarvik-7 artificial heart.
Did Paul Winchell have other patents besides his artificial heart?
Yes, Winchell established more medical patents while working on projects for the Leukemia Society

Question: what were his projects?
Self-contained rewrite: What were Paul Winchell's projects?