Abstract: Improvements in roofing ladders and work platforms; anti-skid devices for aiding seating and movement of a roofing worker on and over the (typically) inclined roof surface being worked; anti-skid seats, platforms and ladders for roofing work.

Abstract: Improvements in road-protecting devices for tracked vehicles which are removably secureable to individual elements of the tracks; heavy-duty road-protecting devices removably secureable to individual segments or elements of endless tracks which permit the tracked vehicle to be actually worked under heavy load without losing the removably secured device; improved apparatus for tensioning and connecting such road-protecting devices on and in engagement with the individual segments or elements of endless tracks where such apparatus permits a limited knuckle or working action of the device during securement; such improved road-protecting devices formed or composed entirely of resilient, deformable yet shape-retaining rubber or plastic, which do not require therewith conventional base or cover plates or the usual bolts or ties associated therewith; such devices having non-extensible elements of rigid or non-rigid character fully received within the bodies thereof, such elements, although within the load thrust zon