How about Helvetica designed in 1956 plenty of research has gone into fonts from way back.
http://en.wikipedia.org/wiki/Helvetica
Its a waste of time making it easier to read, research carried out in 2012 says the less legible the font the better the recall.
http://hbr.org/2012/03/hard-to-read-fonts-promote-better-recall/ar/1