Posts Tagged: "doctrine of equivalents"

Designing Around a Patent as an Alternative to a License

Whenever a company finds itself in the cross-hairs of a cease-and-desist letter or patent infringement lawsuit, a license may not be a viable option. That is often the case when the patent holder is a competitor intent on enforcing a patent against its rivals… The lesson to be taken away is that the efficacy of a design-around is likely to depend on how significant the change is in terms of the claimed invention’s novelty and/or functionality. One should also consider the possibility of incorporating changes that make use of long-standing prior art techniques, methods or elements, especially any that were cited by the patent examiner, in response to which prior art the patentee either amended its claims or distinguished its invention from such prior art during the course of prosecution. 

Entire Market Value Rule Inappropriate When Patented Feature Not Sole Driver of Customer Demand

Power Integrations, Inc. owns U.S. Patent Nos. 6,212,079 (“the ‘079 patent”) and 6,538,908 (“the ‘908 patent”). Power Integrations sued Fairchild Semiconductor Corporation and Fairchild (Taiwan) Corporation (collectively “Fairchild”) for infringement. A jury found Fairchild literally infringed the ‘079 patent and infringed the ‘908 patent under the doctrine of equivalents. The jury subsequently awarded damages of $140 million, applying the entire market value rule in calculating damages. Fairchild appealed. The Federal Circuit affirmed the judgments of infringement, but concluded that the entire market value rule was inappropriately used in this case to calculate damages.

Disputed Claim Construction Not Suitable for Resolution on a Motion to Dismiss

Nalco asserted that the only difference between its patented method and the Chem-Mod Process was the location of the injection. The district court dismissed Nalco’s complaints for failure to state a claim, including its Fourth Amended Complaint (“4AC”) at issue in the present appeal… The Federal Circuit, in an opinion authored by Judge O’Malley, rejected Defendants’ argument that Nalco’s direct infringement claims were implausible and instead agreed with Nalco that the resolution of its claims depended on the construction of the terms “flue gas” and “injecting.” Resolution of this claim construction dispute was inappropriate at the Rule 12(b)(6) stage of the proceedings.

Patentee Fails to Prove Equivalents did not Ensnare the Prior Art

Crafting a proper hypothetical claim is a prerequisite to whether a theory of infringement under the doctrine of equivalents would also ensnare the prior art. The burden to present a proper hypothetical claim cannot be shifted, and a hypothetical claim cannot be broader for the alleged range of equivalents, and not otherwise narrower.

UK Supreme Court says regardless of Article 2, doctrine of equivalents exists under UK patent law

The UK Supreme Court recently addressed the extent to which under the European Patent Convention 2000 (“EPC 2000”), a patentee may obtain protection against products or processes that are not covered by the literal meaning of the claims. In doing so, the UKSC modified what had been previously seen as the established approach of the UK courts towards ‘equivalents’. In particular, while not disapproving the test, the Court has chosen to reformulate the three “Improver” questions that, since 1990, have been in common usage for aiding determinations as to what might constitute patent infringement… The UKSC has concluded that subsequent to the Improver decision, which was then reinforced by the judgment in Kirin-Amgen, there has been a tendency by the UK courts to place “..too much weight on the words of the claim…” and what the patentee might have anticipated or intended. Instead, the UK courts should have focused on whether, on a basis of fact and expert evidence, the variant is a true equivalent of the invention as described in the patent.