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1920s

An Expert At The Patent Process​

Kansas City, Missouri

Crosthwait holds 39 US patents and 80 international patents! After completing his bachelor's and master's degrees in engineering, Crosthwait invented a vacuum pump, boiler, and thermostat control to produce more effective heating systems in more significant buildings – notably the Rockefeller Center and NY's Radio City Music Hall. Crosthwait was the first Black person to be named a fellow of the American Society of Heating, Refrigeration, and Air Conditioning Engineers for all his contributions in 1971. In 1975, he was awarded an Honorary Doctorate from Purdue

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Johns Hopkins University
2800 N. Charles Street
Baltimore, MD 21218

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