According to the present invention there is provided a barrier device comprising a barrier member in the form of a flexible sheet of woven or knitted material having apertures therethrough to allow air to move through. The device further includes at least one marking section of flexible sheet material secured to the barrier member which in use serves as a marking or a carrier of markings.
申请公布号
WO9831870(A3)
申请公布日期
1998.09.17
申请号
WO1998IB00060
申请日期
1998.01.15
申请人
VERTEX TECHNOLOGY AG;SMITH, JACOBUS, FREDERICK;ROGERS, THOMAS, EDWARD