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Hugo Roberts Fernandez

Hugo Roberts Fernandez, Cuban sanitarist and military physician (Trinidad, Las Villas Province 20 July 1868 – La Habana 05 June 1948)
 
 
Patented a thermos regulator (1925)
 

Invented a device to generate and inject hydrocyanic acid into antrum of the rats (Golden Medal in San Francisco World Fair, 1915)