Machines, namely, dampers against seismic, wind and machine induced vibrations; machines, namely, friction dampers for protection of large structures subject to seismic or wind effects; machine parts, namely combined friction/elastomeric dampers for protection of large structures subject to seismic or wind effects; machine parts, namely industrial friction dampers; machine parts, namely industrial combined friction/elastomeric dampers

[ Non-metallic buildings materials, namely, dampers to control vibrations induced by seismic activities, wind, water, traffic, machines, and other vibration-causing objects and events ]

Non-metallic buildings materials, namely, dampers to control vibrations induced by seismic activities, wind, water, traffic, machines, and other vibration-causing objects and events