Escalators Post WWII
Escalators upped their game when prosperous times returned and the late 40s and 50s saw the OTIS company marketing the product directly to customers and finding new business.
It got some competition, which led to a lawsuit and resulted in the loss of the trademark ‘Escalator’ as it had become too generic for everyone.
MORE LIKE THIS
The cheap pen that changed writing forever
14 Fun Facts About Roller Coasters