essentially by non-driven elements

Full Title

Removing undesirable matter from the permanent way of railways; Removing undesirable matter from tramway rails > Methods or apparatus for removing ice or snow from railway tracks, e.g. using snow-ploughs > essentially by non-driven elements

Classification Context

Section:

FIXED CONSTRUCTIONS

Class:

CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES

Subclass:

STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; CLEANING LAND; DISPERSING FOG IN GENERAL