May 29, 1900 (Tuesday)
- The word "escalator" was introduced into the English language, as the Patent and Trademark Office formally granted the trademark to Charles Seeberger for a moving stairway. However, Seeberger lost the trademark fifty years later when a patent commissioner ruled that the term had become generic, in Haughton Elevator Co. v. Seeberger, 85 U.S.P.Q. 80 (Comm'r Pat. 1950)
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