(1) The Federal Patent Court takes evidence in the oral proceedings. In particular, it may carry out an inspection, hear witnesses, experts and parties, and consult documents.
(2) In appropriate cases, the Federal Patent Court may, even before the oral proceedings, have evidence taken by one of its members as judge by commission or request another court to take evidence by designating the individual questions regarding which evidence is to be taken.
(3) The parties are informed of all of the dates scheduled for the taking of evidence and may attend the taking of evidence. They may address relevant questions to witnesses and experts. Where a question is challenged, the Federal Patent Court decides.