US PATENT SUBCLASS 370 / 403
.~.~.~.~.~ At least one bus is a ring network

Current as of: June, 1999
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370 /   HD   MULTIPLEX COMMUNICATIONS

351  DF  PATHFINDING OR ROUTING {5}
389  DF  .~ Switching a message which includes an address header {11}
400  DF  .~.~ Having a plurality of nodes performing distributed switching {6}
401  DF  .~.~.~ Bridge or gateway between networks {1}
402  DF  .~.~.~.~ Bridge between bus systems {1}
403.~.~.~.~.~ At least one bus is a ring network {1}
404  DF  .~.~.~.~.~.~> Ring or loop forms backbone for interconnecting other networks {1}

DEFINITION

Classification: 370/403

At least one bus is a ring network:

(under subclass 402) Subject matter wherein at least one of the bus systems is a closed loop transmission bus.