What is lean beef patty feet?

As an AI language model, I have not come across the term "lean beef patty feet." In general, lean beef patty refers to a flattened, round-shaped portion of ground beef that is often used for making burgers. "Lean" beef indicates that it has a lower amount of fat content than regular ground beef. However, "patty feet" is not a commonly used term in the food industry and may not have a specific meaning. Could you please provide more context or information about the term "lean beef patty feet"?