Escalator was a trademark registered by Otis, the company that made those stairs-go-up devices: https://en.wikipedia.org/wiki/List_of_generic_and_genericized_tr

Escalator was a trademark registered by Otis, the company that made those stairs-go-up devices: https://en.wikipedia.org/wiki/List_of_generic_and_genericized_trademarks https://en.wikipedia.org/wiki/List_of_generic_and_genericize...