US PATENT SUBCLASS 340 / 457.4
.~.~.~ Of service interval expiration

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

425.5  DF  LAND VEHICLE ALARMS OR INDICATORS {11}
438  DF  .~ Internal alarm or indicator responsive to a condition of the vehicle {13}
457  DF  .~.~ Reminder {4}
457.4.~.~.~ Of service interval expiration

DEFINITION

Classification: 340/457.4

Of service interval expiration:

(under subclass 457) Subject matter wherein the required action is the performance of a periodic maintenance function.