US Patent 3,453,928, granted July 8, 1969 to Byron A. Crowe and Robert S. Corp of Coventry, R.I. (assignors to Wildwood Company), describes a method of making tubular seamless lace on a flat-bed Leavers lace machine. Warp threads are divided into front and back groups and crossed or decrossed in step with the bobbin carriage motions, so stockings, gloves and leotards come off the machine without seams. The document has eight sheets of drawings (machine parts, Jacquard action, thread-path diagrams, lace pattern charts), the specification with 8 claims, and a 1970 certificate of correction adding claims 9-13 for the fabric itself.