Bob Dunn (cartoonist)

Bob Dunn (March 5, 1908 – January 31, 1989) was an American cartoonist, entertainer and gagwriter who drew several comic strips. In addition to his own strips, Dunn was known for his work on Jimmy Hatlo's Little Iodine and They'll Do It Every Time, and is said to have invented the modern knock-knock joke in 1936.

Bob Dunn (cartoonist)

Bob Dunn (March 5, 1908 – January 31, 1989) was an American cartoonist, entertainer and gagwriter who drew several comic strips. In addition to his own strips, Dunn was known for his work on Jimmy Hatlo's Little Iodine and They'll Do It Every Time, and is said to have invented the modern knock-knock joke in 1936.