Signify Patent Case Stay Remains in Effect Amid Ongoing Federal Circuit Appeal
The Signify patent case stay continues as a federal judge declined to lift the pause in litigation against Menard and multiple lighting suppliers. The decision keeps the case on hold while appeals proceed at the Federal Circuit. However, the court carved out a narrow exception requiring ongoing document production tied to potentially infringing products.
Case Remains Stayed During Appeal
The U.S. District Court for the Western District of Wisconsin ruled that the litigation should remain stayed until the appeals process concludes. Both Signify and the defendants have appealed portions of the Patent Trial and Appeal Board’s split ruling on the ’366 patent.
The court determined that moving forward now could waste resources. Any district court decision might be overturned or rendered irrelevant depending on the Federal Circuit’s outcome. As a result, maintaining the stay preserves judicial efficiency and avoids duplicative work.
Partial Patent Validity Drives Uncertainty
The underlying dispute centers on LED lighting patents, including the ’366 patent. The Patent Trial and Appeal Board found some claims valid and others invalid. This mixed outcome has created uncertainty for both sides, prompting appeals from each party.
Because the appeals could reshape the scope of the case, the judge emphasized that continuing the stay is the most practical course. Advancing litigation before final patent validity is determined would risk inconsistent rulings.
Spoliation Concerns Raised by Signify
Signify argued that lifting the stay was necessary to prevent potential loss of evidence. The company pointed to deposition testimony suggesting that Menard may not retain certain forecasting data for newly introduced products.
Signify claimed that new SKUs could infringe its patents in similar ways as previously identified products. Without immediate discovery, relevant documents tied to those products could be lost.
Menard disputed this concern. The company stated that its earlier testimony was inaccurate and confirmed that it has preserved relevant documents since at least April 2024. Menard also argued that forecasting data has limited relevance when actual sales data is available.
Court Orders Limited Discovery to Continue
The court rejected Signify’s request to fully lift the stay but acknowledged a narrower solution. It ordered Menard and other defendants to continue producing documents related to new products that share specific features tied to the patents.
This requirement ensures that Signify can monitor potentially infringing products entering the market. It also allows the company to prepare future amendments to its infringement claims once the stay is lifted.
The judge noted that this targeted approach addresses the risk of missing evidence without reopening the entire case. It balances efficiency with fairness to both sides.
What Happens Next
The stay will remain in place until the Federal Circuit resolves the appeals. Both parties must notify the court once a decision is issued.
For now, the litigation remains largely paused. But the ongoing document production requirement signals that the case continues to evolve behind the scenes.
This ruling underscores the ongoing legal complexity surrounding LED technology patents. It also highlights how appellate decisions can shape the pace and direction of major infringement cases.
Read the ruling here:
Signify patent case stay