Systems, methods and interfaces for patent portfolio management are proposed. In one example embodiment, a system comprises at least one module, executing on one or more computer processors, to assign a first, arbitrary patent value unit to any issued patent in the portfolio that has not been cited forward against another patent or application, assign a second, arbitrary patent value unit to any issued patent in the portfolio that has been cited forward against another patent or application, and sum the first and second arbitrary patent values units to derive the aggregate value of the patent portfolio.