US PTO search by patent number
4584639Computer Security System (Factory)
5640569Diverse goods arbitration system and method for allocating resources in a distributed computer system
5781633Capability security for transparent distributed object systems
5790669Lightweight non repudiation system and method
5852666Capability security for distributed object systems
5960087Distributed garbage collection system and method
6049838Persistent Distributed Capabilities
6073242Electronic authority server
6079018System and Method for Generating Unique Secure Values for Digitally Signing Documents
6161121Generic Transfer of Exclusive Rights