US Patent 11540561 Electronic smoking device employing multiple cartridges

An electronic smoking device cartridge arrangement is provided. The device includes an upper joint joinable to an upper cartridge, a central passageway configured to fit with and provide gasses to the upper cartridge, a reservoir comprising a product, and a heating element, wherein heating the product forms a quantity of smoke that passes to and through the central passageway toward the upper cartridge. In one embodiment, product is also heated in the upper cartridge and the combined smoke or gas is provided to a mouthpiece to a user.