Working with researchers in Dusseldorf, he is developing a system that has enabled blind patients to see using sound.

In Germany, bad weather shut down Dusseldorf's airport for part of Friday.

Michael Froehlich, a Duesseldorf car dealer, said he brokered the deal for the unnamed billionaire, who also bought the other vehicles in the collection.

Bryant traveled to Dusseldorf, Germany, in June for treatment, as previously reported.

While Europe’s flag carriers concentrated on their hubs, Emirates sought secondary markets such as Manchester, Glasgow, Hamburg and Dusseldorf.