Here is an update on recent en banc activity at the Federal Circuit in patent cases. Since our last update, the court issued an en banc opinion in a patent case. Additionally, two new en banc petitions were filed. The first raises claim construction questions and the second was filed pro se. The Federal Circuit also invited a response to a petition raising a question related to collateral estoppel, and a new response was filed in opposition to an en banc brief. One amicus brief was also filed with the Federal Circuit. Lastly, the court recently denied five petitions for en banc rehearing. Here are the details.