nov 10, 1903 - Mary Anderson invents the windshield wiper;
this was a handle-operated rubber-bladed system. to remove snow rain and sleet.;
at first, this made no impact but in 1922 Cadillac made windshield wipers standard on cars.;
this made an impact by making it safer to drive in bad weather.; the windshield wipers needed to be made so that it was safer to drive in weather.