Art. 41 CISG
The seller must deliver goods which are free from any right or claim of a third party, unless the buyer agreed to take the goods subject to that right or claim. However, if such right or claim is based on industrial property or other intellectual property, the seller's obligation is governed by article 42.
The Secretariat Commentary on Art. 39 of the 1978 New York Draft, predecessor to Art. 41 CISG, gives insight into the drafters' unterstanding on the eve of the 1980 Vienna Diplomatic Conference.
Overview of case law on Art. 41 CISG: UNCITRAL Digest
The UNCITRAL Digest on the CISG can be used as a starting point to discover the relevant case law on this article.