Generally speaking, the return of patent trading license is very high. The patentee can license the same asset to several different licensees, that is, a general license. In most cases, this will generate higher income than a one-time sale to the buyer;
3. Patent trading license is accompanied by risks: there is no possibility of income, such as patent invalidation or infringement of others can not be proved, there is the possibility of cross-litigation or counterclaim, and potential adverse conflicts; Patent sales do not have this risk.
4. Successful patent trading license needs high economic value, but it also needs additional investment; And sales do not require additional investment.