PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS (derailing or rerailing blocks on track, track brakes or retarders Fulltext... Hierarchy... Expanded...B61K; removal of foreign matter from the permanent way, vegetation control, applying liquids Fulltext... Hierarchy... Expanded...E01H)
CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming road or like surfaces by compacting or grading snow or ice Fulltext... Hierarchy... Expanded...E01H)
STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; CLEANING LAND; DISPERSING FOG IN GENERAL (mowers convertible to apparatus for sweeping or cleaning lawns or other surfaces, e.g. to remove snow, or capable of sweeping or cleaning lawns or other surfaces Fulltext... Hierarchy... Expanded...A01D 42/06; cleaning in general Fulltext... Hierarchy... Expanded...B08B) [4]