Question:  The Rotor is an amusement park ride first demonstrated in 1949 but has been surpassed by an amusement ride designed and manufactured by who?  

Context articles: Topple Tower
Spook-a-Rama
Rotor (ride)
Troika (ride)
Rock-O-Plane
Dragon Coaster (Playland)
Ranger (ride)
Flight to Mars (ride)
UFO (ride)
Gravitron

A Topple Tower is an amusement ride designed in 2001 by van Orsouw Amusement Rides Design Service Berghem (the Netherlands).
 The first design was rejected due to difficult and heavy construction.
 After re-design in 2002, a license agreement was closed, and in 2005 produced, by Huss Maschinenfabrik GmbH, Bremen (Germany) now HUSS Park Attractions.
 The first Topple Tower was placed in 2005 at Bellewaerde Park in Ieper Belgium, the name of the ride was changed in El Volador.
The Spook-a-Rama is a dark ride from the Pretzel Amusement Ride Company located at Deno's Wonder Wheel Amusement Park on Coney Island and run by Million Amusement Corp..
 The rider is pulled around in a car resembling an old wooden barrel.
 These barrels look like connected cars, but separate from each other at the beginning of the ride, so the rider must go in alone, passing paintings that change imagery, and a skeleton before the car itself forces the doors open.
 Inside, the ride is one large, poorly lit room.
 The ride recently had a major renovation done by Scarefactory inc. and more information will surface with the opening of Deno's Wonder Wheel Amusement Park for the 2013 season.
The Rotor is an amusement park ride, designed by German engineer Ernst Hoffmeister in the late 1940s.
 The ride was first demonstrated at Oktoberfest 1949, and was exhibited at fairs and events throughout Europe during the 1950s and 1960s.
 The ride still appears in numerous amusement parks, although travelling variants have been surpassed by the Gravitron.
The Troika is an amusement park ride designed and manufactured by HUSS Park Attractions in the mid-1970s.
 The name means "group of three" in Russian, a reference to its three armed design.
 There are several variations on the design.
The Rock-O-Plane is an amusement park ride designed by Lee Eyerly in 1948 and manufactured by the Eyerly Aircraft Company of Salem, Oregon.
The Dragon Coaster, Playland Park's iconic attraction, in Rye, New York, is a wooden roller coaster that was opened in 1929.
 It was designed and built by legendary amusement ride creator Frederick Church, who also was the co-inventor of the Racing Derby, another famous early 20th century amusement park ride.
 The Dragon Coaster has approximately 3,400 feet of track and is, at its highest, approximately 80 feet tall.
 There is a tunnel along its span, a common feature of wooden roller coasters from the 1920s, that resembles the body and open mouth of a Dragon.
 It has also been featured in the film "Fatal Attraction", Mariah Carey's music video "Fantasy", and "Big", starring Tom Hanks.
 The Dragon Coaster is still in operation to this day.
A Ranger is an inverting pendulum ride first manufactured by HUSS Machinenfabrik in 1981.
 Many of the design elements were later used in the HUSS Rainbow, and the term 'Ranger' has become synonymous with inverting pendulum rides.
 It was the first inverting swing ride designed since Lee Eyerly's Loop-O-Plane and set the standard for many other attractions using the inverting pendulum ride system, such as the Rainbow, the Kamikaze (ride), and the Inverter.
The Flight to Mars amusement park ride was located in 1962 World's Fair and the Seattle Center's Fun Forest (1968-1996).
 The ride was a type of dark amusement ride.
 Riders would ride in 2 seated cars which rode around on a coaster track while scary themed events would occur during the ride.
 The interior decor was studded with use of black lights and glow paint.
The UFO is an amusement park ride designed by HUSS Maschinenfabrik in 1978, based on the company's Enterprise and Skylab amusement rides.
 Numerous carnivals feature this ride which is known as Alpha One Peeters and Vertical Limits.
The Gravitron (also known as the Starship, Starship 2000, Starship 3000, Starship 4000, Starship Area 51, Starship Gravitron, Starship Exodus, Alien Abduction, Alien Invasion, Twister, Devil's Hole, Area 51, and Enterprise) is an amusement ride, most commonly found as a portable ride at fairs and carnivals.
 The Gravitron first appeared at Morey's Piers in 1983 and quickly became a fixture at amusement parks in many countries.
 It is a modification of an earlier ride called the Rotor.
 The ride was originally designed and manufactured by Wisdom Industries, though several examples of the Gravitron were produced under license by ARM in the UK and Ferrari in Australia.