Read the passage below. Are sentences 37 - 40 'Right' or 'Wrong'? If there is not enough information to answer 'Right' or 'Wrong', choose 'Doesn't say'.

Escalators are very common today in shopping malls, government buildings, amusement parks, and many other locations. They are known to be staircases which move via a conveyor belt, with tracks which maintain each step in a horizontal position. However, the escalator began as an amusement and not as a practical transport. The first patent relating to an escalator-like machine was granted in 1859 to a Massachusetts man for a steam-driven unit. In 1892, Jesse Reno patented his moving stairs, or “inclined elevator”. Three years later, he created a novelty ride at Coney Island from his patented design: a moving stairway that elevated passengers on a conveyor belt at a 25 degree angle. 

Charles Seeberger, together with the Otis Elevator Company, produced the first commercial escalator in 1899 at the Otis factory in Yonkers, N.Y. The Seeberger-Otis wooden escalator won first prize at the Paris 1900 Exposition Universelle in France. Charles Seeberger sold his patent rights for the escalator to the Otis Elevator Company in 1910, which also bought Jesse Reno's escalator patent in 1911. Otis has dominated escalator production since that time, by combining and enhancing various designs including the cleated, level steps still in use today. The word “escalator”, which was at first a trademarked name, has become a common descriptive term.