Ajit Pai @AjitPai
OTD in 1885, @uspto granted Marcus Thompson a patent for a "Gravity Switch-Back Railway," a "means of pleasure and amusement" in which passengers starting at a "suitable elevation" would stop at a lower "pavilion or other suitable structure." Today, we call it the roller coaster. https://t.co/Vqh2pmTJN3 — PolitiTweet.org