Abstract: In a certain range of time and space,Patent trade body transfers or licenses patent “product”,which forms a market structure with mutual influence and linkage of involved parties.According to the theory of monopolistic competition,patent market structure can be divided into monopolistic competition and oligopoly.Patent “product” is intangible and monopoly and complexity,this prompted us to pay attention to the patent market structure,and accordingly patent trading system design.

Key words: patent transaction, market structure, monopolistic competition, oligopolyL