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| Number | Title | Issue Date |
| 5659718 | Synchronous bus and bus interface device A high performance bus and bus interface device for interconnecting numerous devices without using dedicated high current drivers at each device. The bus is synchronous and divided into a plurality of primary local busses and at least one global bus. Data... | 08/19/1997 |
| 5638512 | Ring network security system with encoding of data entering a subnetwork and decoding of data leaving the subnet work A system for securing communications between devices connected to a ring network. In accordance with the present invention, when a message frame is passed around the ring network, a gate keeper circuit associated with at least one port of a hub determines... | 06/10/1997 |
| 5522047 | Graceful insertion of a tree into a ring network Systems and methods for providing graceful insertion of a station or tree into a ring type network. According to one aspect of the invention, graceful insertion is achieved after coupling a tree to a tree link of a master port by switching the tree into a... | 05/28/1996 |
| 5495580 | Ring network security system with encoding of data entering a subnetwork and decoding of data leaving a subnetwork A system for securing communications between devices connected to a ring network. In accordance with the present invention, when a message frame is passed around the ring network, a gate keeper circuit associated with at least one port of a hub determines... | 02/27/1996 |
