Patent classifications
E
FIXED CONSTRUCTIONS
Load children
E06
DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
Load children
E06C
LADDERS
Load children
E06C1/02
with rigid longitudinal member or members
Load children Filter patents View analytics View as hierarchy
E06C1/38
Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
Load children Filter patents View analytics View as hierarchy
E06C1/387
having tip-up steps
Filter patents View analytics View as hierarchy