Hey did you know that as early as 1862, aerosol technology existed. American military later created aerosol cans that was used for insecticides when fighting in WW2. Did you also know that in 1947 a 27 year old inventor named Robert H. Abplanalp came up with the last essential part of what to become the prototypical form of aerosol cans, which is the crimp on valve. Like the coolest thing ever the man 
Edward Seymour came up with the brilliant idea of putting paint in the cans. This man made graffiti art possible! Amazing!