2FIRSTS Technical AnalysisInfringement of JUUL's Airflow Pathway Patent No. 173 by NJOY ACE Cartridges FDA OKs first menthol e cigarettes, citing potential to help adult smokers WCIA.com JUUL vs. Vape Pen Which Is Right for Me? The FDA is allowing vaping brand Juul to keep its e cigarettes on the market. Studies from Juul show its e cigarettes are less harmful for adult smokers, who can benefit from switching completely