US PATENT SUBCLASS 454 / 83
.~ Railcar, bus, or trailer

Current as of: June, 1999
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454 /   HD   VENTILATION

69  DF  VEHICLE (E.G., AUTOMOBILE, ETC.) {15}
83.~ Railcar, bus, or trailer {10}
84  DF  .~.~> Locomotive cab {2}
87  DF  .~.~> Sleeping car
88  DF  .~.~> Freight {3}
93  DF  .~.~> Condensation preventer (e.g., defroster, etc.)
94  DF  .~.~> Having exterior cap closure for vent
95  DF  .~.~> Having window or entry-door ventilation structure {1}
99  DF  .~.~> Having forced recirculation {1}
103  DF  .~.~> Having both inlet and outlet airways {2}
107  DF  .~.~> Having inlet airway {4}
115  DF  .~.~> Having outlet airway {2}

DEFINITION

Classification: 454/83

Railcar, bus, or trailer:

(under subclass 69) Subject matter wherein the transporting device is particularly adapted to (1) run on a rail, (2) carry a large number of people, or (3) be drawn by a

propelling vehicle.

(1) Note. Subject matter relating to a mobile home which is essentially stationary is not included in this and indented subclasses. However, subject matter relating to a self-propelled or towed recreational vehicle which is essentially mobile is included in this subclass.