As I understand it there was multiple "vaping" device invented many years right before Ruyan at any time mass developed an e-cigarette, by far the most popular a single currently being the a single within the patent pic below from Herbert Gilbert. For those who really sense that PG is https://chuckles-gummy-worm-edibl36057.tinyblogging.com/examine-this-report-on-buy-vape-juice-online-using-paypal-78684701