Patent 7938356 was granted and assigned to Stratasys on May, 2011 by the United States Patent and Trademark Office.
A filament spool for use in a filament spool container, where the filament spool comprises a first rim and a second rim offset by an axial shaft, and a series of grooves extending along a first portion of the first rim and configured to receive a filament of a material while the filament is wound around the axial shaft in a first rotational direction.