Marko Djordjevic

i created lineboard, new skateboard with 3 inline wheels and precise steering with two wheels in front connected with steering mechanism.
I made invention for binding shoestrings, you attach small mechanism on side of the shoe and pressing one button tie your shoe, other button is for release the shoestring.
I designed winter car tire for dry and snow, where tire pressure dictates tire surface and changing tire pressure on your gas station or at home you regulate type of tire.