US PATENT SUBCLASS 370 / 404
.~.~.~.~.~.~ Ring or loop forms backbone for interconnecting other networks

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  DF  .~.~.~.~.~ At least one bus is a ring network {1}
404.~.~.~.~.~.~ Ring or loop forms backbone for interconnecting other networks {1}
405  DF  .~.~.~.~.~.~.~> The other networks are ring or loop networks

DEFINITION

Classification: 370/404

Ring or loop forms backbone for interconnecting other networks:

(under subclass 403) Subject matter wherein a closed path transmission system serves as a central switch for switching information to and from other networks.