US PATENT SUBCLASS 169 / 64
.~ For mine
Current as of: June, 1999
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DEFINITION
Classification: 169/64
(under subclass 54) Apparatus, designed for use in extinguishing or in the prevention of fires in a subterranean environment of solid natural material.
(1) Note. This subclass includes apparatus for dusting the walls of mines as a preventive measure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45, for methods of preventing mine fires and explosions.
SEE OR SEARCH CLASS
299, Mining or In Situ Disintegration of Hard Material,
1.05, for signaling or indicating means for fire conditions as part of mine structure and subclass 12 for mine safety methods.
