Who invented expo markers?

Melanie Fabian =) in the year 1984. in a dark creepy abandoned house in South Africa. she moved to the united states and became president of EXPO. she now sits in her beach house in South Carolina with millions in her bank. she has her private beach with lots of hot guysss =D. she drives Lamborghini gallardo and all the guys envy it. She is now 32 years young and living life to the fullest.

so if you need to know who invented whiteboard markers there you go! =D