An e-cigarette is a long tube that usually resembles a cigarette, a cigar, a pipe, or a pen. Most are reusable, with replaceable and refillable cartridges, but some are disposable.
The first patent for a "smokeless, non-tobacco cigarette" was requested by Herbert A. Gilbert in 1963, but the current device did not appear until 2003.
The e-cigarette as we know it was invented by Hon Lik, a Chinese pharmacist, working for Golden Dragon Holdings, now known as Ruyan. The company started exporting into major markets from 2005 to 2006. There are now over 460 different brands on the market.
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