Key legal question
Whether the defendant had a contractual duty to disclose prices and third-party manufacturers under German law.
Extracted holding
The duty of information existed in principle, but it was limited to information connected with the contractual relationship and accessible to the plaintiffs at the time; prices and other manufacturers could be excluded.
Extracted reasoning
Under § 241(2) BGB, information duties are shaped by the concrete contract and its purpose. Relying on the parties' former contractual dealings rather than the Düsseldorf patent judgment was not arbitrary. Distinguishing between information the plaintiffs had access to and information they never received was reasonable and protected the defendant's trade secrets.