US PATENT SUBCLASS 454 / 332
.~.~.~.~ Readily moveable grating

Current as of: June, 1999
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454 /   HD   VENTILATION

254  DF  HAVING INLET AIRWAY {11}
284  DF  .~ Including specific air distributor (e.g., register, etc.) {14}
330  DF  .~.~ Having register box, frame, or grating {1}
331  DF  .~.~.~ Including specific grating or grating mounting structure {1}
332.~.~.~.~ Readily moveable grating

DEFINITION

Classification: 454/332

Readily moveable grating:

(under subclass 331) Subject matter wherein the grill-like exit structure and accompanying support are easily repositioned relative to one another.

(1) Note. A grill-like exit structure which requires a tool such as a screwdriver to reposition it relative to an accompanying support is not included in this subclass.