c2ab065dbd69989ed187aa2095643b2435d9efdebuliabyakThis is the directory with Inkscape's stock patterns. They are

c2ab065dbd69989ed187aa2095643b2435d9efdebuliabyakstored in the defs of the SVG document patterns.svg. Within

c2ab065dbd69989ed187aa2095643b2435d9efdebuliabyakInkscape, they can be accessed via the pattern fill option on either

c2ab065dbd69989ed187aa2095643b2435d9efdebuliabyakFill or Stroke tab of the Fill & Stroke dialog (Ctrl+Shift+F). You

c2ab065dbd69989ed187aa2095643b2435d9efdebuliabyakcan also create a new pattern from selected objects by the Objects

c2ab065dbd69989ed187aa2095643b2435d9efdebuliabyakto Pattern command.