Who makes NMR machines?

Who exactly are the manufacturers and producers of NMR machines? Are there any specific companies that dominate the market in terms of production and innovation? Are there any notable players in the field that have made significant contributions to the advancement of NMR technology? Furthermore, what are the key factors that contribute to the success and reputation of these companies in the NMR machinery industry? I'm curious to learn more about the origins and backgrounds of the companies that create these sophisticated and essential tools for scientific research and medical imaging.