Confirmatory Patent Assignment Template for Germany

A Confirmatory Patent Assignment is a specialized legal document used to formally validate and document patent ownership transfers that have already taken place in Germany. Unlike standard patent assignments that create new transfers, this document confirms and reinforces existing ownership changes, ensuring they meet all legal requirements under German patent law and can be properly registered with the German Patent and Trade Mark Office (DPMA).

When do you need this document?

You need a Confirmatory Patent Assignment when patent ownership has already changed hands but requires formal documentation for legal certainty or registration purposes. This commonly occurs in corporate mergers and acquisitions where patents were transferred as part of broader asset deals but need specific confirmation for DPMA records. Employee inventors often require this document when their workplace inventions were informally assigned to employers under the German Act on Employee Inventions (ArbnErfG) but lack proper documentation. University technology transfer offices frequently use confirmatory assignments when spinning off research-based companies or when clarifying ownership of faculty inventions. The document is also essential when historical patent transfers occurred through verbal agreements or inadequate written documentation that doesn't meet current German legal standards.

Key legal considerations

The document must clearly identify all patents by their German patent numbers, application numbers, or European patent numbers with German designation. You must establish the original transfer date and circumstances to demonstrate when ownership actually changed, as this affects the validity period and any intervening rights. The confirmation should address all rights, title, and interest in the patents, including any pending divisional applications or continuation rights. If employee inventions are involved, you must ensure compliance with ArbnErfG requirements regarding inventor compensation and notification procedures. The assignment should also address any encumbrances, licenses, or third-party rights that may affect the patents. Consider including warranties about the assignor's authority to confirm the transfer and representations about the current status of the patents.

Legal requirements in Germany

Under the German Patent Act (PatG), patent assignments must be in writing and clearly identify the transferred rights to be legally effective. The document must comply with German Civil Code (BGB) contract formation requirements, including proper identification of parties and consideration of the original transfer. For DPMA registration, you need specific patent details, proof of the original transfer, and evidence of the parties' legal standing. If the assignment involves commercial entities, German Commercial Code (HGB) provisions may apply to the transaction documentation. The confirmatory assignment must be signed by authorized representatives of both parties, and notarization may be required depending on the corporate structure involved. You should also consider EU regulations if the patents have European designation or if cross-border elements are present in the ownership structure.