Biography of Robert o Johann

I'm sorry, but there is no widely recognized figure by the name of Robert O. Johann in history or contemporary culture. It is possible that you may have misspelled the name or are referring to a lesser-known individual. Without more context or specific details, it is difficult to provide a biography for someone with that name. If you can provide more information or clarify the individual you are referring to, I would be happy to help with a biography.