US PATENT SUBCLASS 362 / 379
SMOKE BELLS
Current as of: June, 1999
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DEFINITION
Classification: 362/379
(under the class definition) Subject matter comprising means
placed over flame-type light sources to prevent the heat or smoke therefrom from blackening or otherwise injuring superimposed structures (e.g., ceilings).
SEE OR SEARCH CLASS
104, Railways,
52,.
454, Ventilation, appropriate subclasses for smoke bells which may also ventilate a room or other structure.
