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| Number | Title | Issue Date |
| 4811337 | Distributed load sharing Methods and apparatus for exchanging frames between bridges distribute load sharing in a communications network. The communications network is of the kind in which bridges, and related stations and local LANS, e.g. Ethernet LANs and 802 LANs, can be linke... | 03/07/1989 |
| 4809265 | Method and apparatus for interfacing to a local area network A controller for a bridge interconnecting local area networks operates in two modes. In a first mode the controller receives and transmits station data frames with previously appended frame check sums. In a second mode the controller responds to requests ... | 02/28/1989 |
| 4706081 | Method and apparatus for bridging local area networks A communications system interconnects local Area Networks (LAN's) across broadcast simplex channels. The LAN's are connected independently and transparently of protocols above the data link layer so that the system appears to the user at a station in one ... | 11/10/1987 |