Abstract
1. Introduction
2. Problems With Patent System
2.1 Cumulative Nature of Innovation
2.2 The Problem of Complements
2.3 The Tragedy of Anticom mons-Fragmented Ownership
2.4 Strong Patent Protection
2.5 Rise of Non Practicing Entities-Patent Trolls
3. Patent Pool
4. Patent Valuatlon
5. Conclusions
References
요약