In this decision the Danish Supreme Court for the first time uses equivalents as a legal base for violation of a patent. Equivalents have long been a part of Danish patent law, but the Supreme Court has been cautious and reserved concerning their use. The respondent in this case had a Danish patent, concerning a method for corrosion-protection of a water system. The appellant made a system that had similarities to the system of the respondent. The respondent’s patent concerned the actual method, not the specific facility in which the method was used. The Supreme Court held that, even if appellant’s system was found to be outside the exact wording of the respondent’s patent, the appellant would still violate the patent due to technical equivalents.

The full summary of this case has been published on Kluwer IP Law.


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