Patent license fee based on economic effects is valid under Polish Patent Act freedom of contract.

The Supreme Court dismissed the patentee's cassation appeal against a lower court ruling ordering the licensee to pay license fees. The dispute centered on whether fees calculated as a percentage of economic effects derived from the patent's prior application were permissible under the Patent Act. The court held that the statute allows parties to freely determine fee structures, including those based on economic results rather than production volume, and rejected the patentee's argument regarding patent specifications as irrelevant to the contract's validity.