Tongrentang and Beijing Tongrentang is a family?

Generally what people say Tongrentang and Beijing Tongrentang is said to be a family, Tongrentang is a trademark name, its owner is Beijing Tongrentang, full name is China Beijing Tongrentang (Group) Limited Liability Company. <br> But due to the history of the Tongrentang has four houses and public-private partnership and other special experience, coupled with the history of some of the cooperative relationship, so now can see there are a number of enterprises with the name, such as Nanjing Tongrentang, Tianjin Tongrentang, Chengdu Tongrentang, etc., but it is only as the name of the enterprise, and does not have the "Tongrentang" trademark font size ownership. Tongrentang" trademark ownership.