Lloyd Copeman: Different Drum

“He used to demonstrate one of his inventions, a 1918 version of the microwave oven that he called ‘cold heat,’ by frying an egg through a newspaper. Thinking that the oven was too expensive to manufacture, he never patented it.

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Lloyd Copeman: Forgotten Genius

Lloyd Copeman had a slew of impactful innovations among his 650-plus patents but is not in the National Inventors Hall of Fame. Copeman profited handsomely from sales of his invention rights but went through money quickly, usually in search of other discoveries.

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