The tense situation in the financing market is not only due to the often weak equity capital but also to the fact that the rating requirements regarding the implementation of Basel II have been increased and strictly regulated. The potential of a patent or patent portfolio is often underestimated, leading SMEs to either fail to recognize its value or not utilize it optimally. In addition to traditional forms of corporate financing, such as genuine and non-genuine factoring, the importance of alternative financing options is particularly growing. One such alternative is the buying and selling of patents. The book describes and analyzes all important aspects of patent sales and examines the extent to which there are potentials in the financial and stock market and whether this type of corporate financing represents an alternative.