It is common to see patentees coexist with infringers in developing countries, which leads to a split of patent value between patentees and infringers. This paper extends traditional model for estimation of patent value. We classify patentees by technology level: Patentees with low technology...

This paper improves renewal payment based patent value model by introducing unexpired patents into the model. We estimate value of the invention patents based on SIPO records in China and compare values of patents between local owners and owners from the U.S., Japan and European countries. The...