Ralph R. Teetor - a blind scientist who invented a speed control device. Which further helped in the invention of cars and traveling became convenient but everything has an expiry date and with cars now it's easy to sell.OLX Autos dete hai aapke car ka best price! Hassle-free, trustworthy and completely transparent. Yes, that's right, listen to Jaswinder who sold his care on OLX Autos and is living his life to the fullest happily.