US PATENT SUBCLASS 454 / 90
.~.~.~ Refrigerated or heated

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


454 /   HD   VENTILATION

69  DF  VEHICLE (E.G., AUTOMOBILE, ETC.) {15}
83  DF  .~ Railcar, bus, or trailer {10}
88  DF  .~.~ Freight {3}
90.~.~.~ Refrigerated or heated {1}
91  DF  .~.~.~.~> With air pump

DEFINITION

Classification: 454/90

Refrigerated or heated:

(under subclass 88) Subject matter wherein the ventilated space is cooled below or warmed above ambient temperature.

(1) Note. See the "Search Class" notes in the class definition for a discussion of the lines between this class and the various heating and refrigerating classes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

91, for an ice-bunker closure.