Misc: What useful device was invented and marketed by Charles Moncky?

Questions

In 1902 Margaret Hamilton, actor (---------- ), played Wicked Witch of the West, born. ?

In 1913 ---------- Owens, athlete, spoiled Hitler's Olympic plans in 1936, born. ?

In 1913 Jesse---------- , athlete, spoiled Hitler's Olympic plans in 1936, born. ?

In 1921 ---------- Cabral, worked for independence of Portuguese Africa, born. ?

In 1921 Amilcar---------- , worked for independence of Portuguese Africa, born. ?