C.A.R.L. Ver Genius is remembered best, in some quarters, for his patented printer’s quoin. The patent is: “Printers Quoin,” US patent 298,639, granted May 13, 1884, to C.A.R.L. Ver Genius of Galesberg, Illinois, USA. Here’s a highlight from the patent: BONUS: A modern, spirited discussion about quoins BONUS (unrelated): Wolfgang Genius‘s mobile crushing system