An ink stick comprises an ink stick body having first and second opposed ends. A first interlocking face on the first end and a first interlocking face on the second end have complementary nesting shapes and are oriented to allow the first interlocking face of an end of the ink stick body to nest with...http://www.google.de/patents/US7798627?utm_source=gb-gplus-sharePatent US7798627 - Multi-position interlocking ink stick
