Usage rights to digital content are dynamically assigned. Various dynamic conditions are monitored and the usage rights are adjusted in a predetermined manner based on the status of dynamic conditions. The dynamic conditions include the time of day, the load on a server or network, or the like. The resolution...http://www.google.com/patents/US6754642?utm_source=gb-gplus-sharePatent US6754642 - Method and apparatus for dynamically assigning usage rights to digital works
