"SfR Fresh" - the SfR Freeware/Shareware Archive 
Member "inkscape-0.46/share/patterns/README" of archive inkscape-0.46.zip:
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1 This is the directory with Inkscape's stock patterns. They are
2 stored in the defs of the SVG document patterns.svg. Within
3 Inkscape, they can be accessed via the pattern fill option on either
4 Fill or Stroke tab of the Fill & Stroke dialog (Ctrl+Shift+F). You
5 can also create a new pattern from selected objects by the Objects
6 to Pattern command.