US PATENT SUBCLASS 454 / 330
.~.~ Having register box, frame, or grating


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

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


DEFINITION

Classification: 454/330

Having register box, frame, or grating:

(under subclass 284) Subject matter comprising a casing, support, or grill-like exit structure for a means which releases or directs the air immediately into the ventilated space.

SEE OR SEARCH THIS CLASS, SUBCLASS:

270+, for a sleeved vent in a ceiling, wall, or floor.