81980 ⎘
Kinds or types of lifts in, or associated with, buildings or other structures inclined, e.g. serving blast furnaces associated with stairways, e.g. for transporting disabled persons; Driving mechanisms Screw and nut
IMPROVEMENTS IN OR RELATING TO STAIRLIFTS
Control Systems and Methods to Provide Sensor-Based Control
Apparatus for ascending and descending stairs with a wheelchair
Vertical lift assembly