Hon Lik invented the e cigarette to quit smoking but now he's a dual user Vaping The Guardian An Interview with the Inventor of the Electronic Cigarette, Herbert A Gilbert E Cigarette Direct These entrepreneurs have become the first e cigarette billionaires The National Howard Panes: "I Built A $100 Million Business In 540 Days" How Juul Hooked a Generation on Nicotine The New York Times Japan Tobacco to buy U.S. e cigarette maker Logic Technology Reuters