1. Elijah McCoy was an engineer. He invented the automatic lubicating devices for steam engines. Some other inventions were the ironing board and the lawn sprinker.
2. Celluar Phone: invented by Henry Sampson
Refrigerator: invented by J. Standard
Roller Coaster: invented by Granville T. Woods
3. The clothes dryer that uses heat from the stove: George T. Sampson. Now everyone can dry their wet clothes; even though the dryer has long since been advanced, George T. Sampson still made the first one.
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