US PATENT SUBCLASS 340 / 439
.~.~ Operation efficiency (e.g., engine performance, driver habits)

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}
439.~.~ Operation efficiency (e.g., engine performance, driver habits)

DEFINITION

Classification: 340/439

Operation efficiency (e.g., engine performance, driver habits):

(under subclass 438) Subject matter wherein the degree of efficiency in the operation of the vehicle is indicated.

(1) Note. Included here are devices which indicate: (1) relative fuel economy, (2) erratic driving behavior, or (3) other factors related to improper operation of the vehicle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

575, and 576, for devices which determine driver capability or alertness.