When Did John Guedel Die?

John Guedel was an American radio and television producer who co-created and produced Art Linkletter's and Groucho Marx's most important and successful broadcast properties, including You Bet Your Life, House Party and People Are Funny. He also created The Adventures of Ozzie and Harriet and is sometimes credited with the first singing radio commercial in 1937. He was a producer for The Charlotte Greenwood Show on radio.