71479279
Feb 1, 1945
Sep 17, 1946
UNWOVEN FIBER SHEETING IN THE NATURE OF CLOTH AND PAPER, PREPARED BY BINDING FLEECES OR WEBS OF INDIVIDUAL FIBERS, FOR EXAMPLE, VEGETABLE OR SYNTHETIC FIBERS AND USED AS A SUBSTITUTE FOR PAPER AND WOVEN CLOTH, AS FOR EXAMPLE WHEN UNLAMINATED AS AN INFUSON MATERIAL FOR TEA BAGS
Building Construction and Repair