Márton Koppány (b. 1953) lives in Budapest, Hungary. He started writing visual poetry at the end of the seventies and since then his work has been widely published and exhibited. His next book in print, Addenda, is to come out in 2012 from Otoliths, Australia. The following interviews are good sources to find more info about him:
http://verysmallkitchen.com/2010/09/09/a-primer-in-concrete-david-berridge-and-marton-koppany/
http://www.3ammagazine.com/3am/maintenant-69-marton-koppany/