The history of electronic cigarettes dates back to the early 20th century. In 1927, Joseph Robinson filed a patent for an "Electric Vaporizer" intended to deliver medicinal vapors. In the 1960s, Herbert Gilbert patented a "smokeless non-tobacco cigarette" that used heated air to mimic smoking. However, it was not until 2000 when Hon Lik invented a modern e-cigarette after dreaming of his father's death from lung cancer from smoking. Hon Lik's e-cigarette design used a heating element to vaporize a flavored liquid containing nicotine. His 2004 patent is considered the first modern e-cigarette, and the industry has grown exponentially since its introduction to Europe in 2006