(under subclass 10) Process in which a step is included for preventing injury to a human working in a mine or mining operation.
SEE OR SEARCH THIS CLASS, SUBCLASS:
11, for a process including a step for stabilizing the mine roof, sidewall or floor.
SEE OR SEARCH CLASS
169, Fire Extinguishers,
45, for a process of preventing fire, and subclass 64 for apparatus for preventing or extinguishing a fire in a mine.
454, Ventilation, particularly 168+, for a process or apparatus for ventilating a mine for the safety and comfort of workers, including mine safety doors and means for supplying entombed miners with air.
