US PATENT SUBCLASS 340 / 933
VEHICLE DETECTORS

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

933VEHICLE DETECTORS {10}
934  DF  .~> Density
935  DF  .~> Discriminates vehicle direction
936  DF  .~> Speed and overspeed
937  DF  .~> With camera
938  DF  .~> Compensation for vehicle remaining at sensor position
939  DF  .~> Environmental or drift compensation
940  DF  .~> With pneumatic
941  DF  .~> Inductive
942  DF  .~> Photoelectric
943  DF  .~> Sonic or ultrasonic

DEFINITION

Classification: 340/933

VEHICLE DETECTORS:

(under the class definition) Subject matter for sensing the presence or motion of traffic.

SEE OR SEARCH CLASS

246, Railway Switches and Signals,

122+, for train position indication and subclasses 246+ for car actuated circuit controllers.

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,

9, for vehicle counters, per se.