Wikipedia says Mickey Mouse was created by Walt Disney and Ub Iwerks. Walt Disney died in 1966, but Ub Iwerks only died in 1971, so wouldn't it still be a few m

Wikipedia says Mickey Mouse was created by Walt Disney and Ub Iwerks. Walt Disney died in 1966, but Ub Iwerks only died in 1971, so wouldn't it still be a few more years before that 50 years after death runs out?