An apparatus for modifying sewing data to control a sewing machine including (a) a stitch-forming device for forming stitches on at least one work sheet, (b) a work-holding device for holding the work sheet, and (c) a displacing device for displacing at least one of the stitch-forming device and the...http://www.google.co.uk/patents/US5537945?utm_source=gb-gplus-sharePatent US5537945 - Sewing data modifying apparatus
