Applying the doctrine of equivalents in patent litigation

The scarcity of patent litigation cases in Mexico as compared to other jurisdictions has resulted in a lack of case law in several key areas of patent litigation. One such area is the situation where a product does not have all of the features of the claims of a granted patent, but is so close that it appears that a feature was changed to circumvent patent coverage through the incorporation of an equivalent feature. Under US practice, this is known as the ‘doctrine of equivalents’.

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