Based on the clue 'at his death in 323 bc alexander the greats empire...', what is the answer?

What is associated with: at his death in 1931 this jersey boy had more than a thousand patents to his name? What is associated with: at his death in 1941 this pianist was president of polands exiled government? What is associated with: at his death in 1971 there were more than 1600 department stores bearing his name? What is associated with: at his death in 1995 this polio vaccine developer was working on another vaccine to prevent fu… What is associated with: at his death in april 1955 his brain was preserved his ashes scattered in the delaware river? What is associated with: at his death in march 1848 he left a fortune estimated at 20 million acquired in the fur trade… What is associated with: at his death on october 20 1964 he had survived his presidency longer than any other president… What is associated with: at his death this oregon runner movie bio subject held every us record from 2000 to 10000 mete…