Who owns the patent of Xu Yaotang plaster?

The patent of Xu Yaotang Plaster belongs to Chongqing Xu Yaotang Pharmaceutical Trading Co., Ltd. Xu Yaotang is an enterprise mainly engaged in the trade, processing, production, sales and technical services of Chinese herbal medicines. It has many kinds of drugs, including Xu Yaotang plaster. The plaster is made of many kinds of Chinese herbal medicines, which has certain analgesic and detumescence effects, and has been widely used and recognized in clinic.