I think it was G-Tech back in '03. The cheesy web site said that Ride Tek formed in 2001, so I don't think it is Giovanola. The pics on their page are pretty bad. The larger models appear to have a box spine, but I couldn't see the ties for comparison.
Cobra looked a little intense for a family coaster. It looks like it may be the only thing they ever sell.
Update on http://jp.dk Two employees from the Italian company that manufactured the Cobra roller coaster in Tivoli Friheden, have just arrived in Aarhus to investigate the roller coaster accident that occurred on Friday evening. The accident sent four of the park visitors to the hospital.
The two Italians, a designer and a maintenance inspector must now look at the roller coaster, where on Friday evening the front car fell to the ground with two guests on board.
According to preliminary reports from the Institute of Technology - they suspect a broken wheel axle may have caused the accident, but the actual cause has not yet been determined. The damaged part of the roller coaster is at the Technological Institute in Aarhus, and will be examined Monday.
I kind of like some of the coaster concepts they have on their side, especially "Thor's Hammer". I has to be said though that their animations look a little fishy (It seems like NoLimits could have done a better job on many of them).