According to the ranking 123, Sigma Elevator Co., Ltd. is a well-known elevator brand founded in Korea. Founded in 1968, the company is a subsidiary of Otis Elevator Company, which inherits the honor and technology of Otis Elevator in Korea. As a multinational professional lifting equipment company, Sigma Elevator inherits one of Otis' important strategic bases in the world and enjoys a high reputation for its high-quality products and advanced technology.