Conversation so far:
what did Paul Winchell do medically?
He also worked as a medical hypnotist at the Gibbs Institute in Hollywood.
He developed over 30 patents in his lifetime.
what were some of his patents?
Jarvik.
what was jarvik?
creating Jarvik's artificial heart.
did he have other patents?
more medical patents while working on projects for the Leukemia Society (now known as the Leukemia & Lymphoma Society) and the American Red Cross.
what were his projects?
a blood plasma defroster.

Question: were any of his patents successful?
Self-contained rewrite: Were any of Paul Winchell's patents successful?