ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,439,976, issued on Oct. 14, was assigned to AYR LTD. (London).
"E-cigarette personal vaporizer" was invented by Kaveh Memari (London), Adrian Bennett (London), Ian Murison (London) and Stephen Marsh (London).
According to the abstract* released by the U.S. Patent & Trademark Office: "An e-cigarette PV that includes an air pressure valve or device so that excess air can escape from an e-liquid reservoir in the PV when that reservoir is being filled under pressure with e-liquid from a parent reservoir. The valve or device is a barrier made of an air-porous material, such as a sintered polymer or metal, coated with or otherwise including a barrier or layer of an air-porous substance tha...