1 jan 1927 ano - "Electric Vaporizer" patented
Descrição:
In 1927 Joseph Robinson filed a patent for the first electric vaporizer. “My invention relates to vaporizing devices for holding medicinal compounds which are electrically heated to produce vapors for inhalation, and to provide a device for individual use which may be freely handled without any possibility of being burned.” – Joseph Robinson, May 3, 1927, New York.
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