Incase of making contribution in practicality, industrial property, and patented technology as capital, the joint venture partners shallprovide valid law document proofs showing their ownership, right of usage, right of disposition and evaluation. 以实物、工业产权、专有技术等作价出资的,必须出具所有权、使用权、处理权及作价价值的有效法律文件和说明。