Patent 1721498 - 1721498


United States Patent Patent Number 1,721,498
Issue Date: Issued July 16, 1929

Current U.S. Class: 139/397 - 139/402
Current International Class: D03D03/00 (20060101)
Current CPC Class: D03D 3/00 (20130101); D03D 2700/0122 (20130101)


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