The back and forth continues. US International Trade Commission Administrative Law Judge Thomas Pender has made an initial ruling that some Samsung's devices violate four Apple patents, including one iPhone design patent (the one you see above) and three software patents. Apple didn't manage a clean sweep, as Samsung was cleared of treading on two more patents, but the verdict still carries the all-too-familiar potential for a trade ban if the ITC maintains the findings in its final review. It's bleak news for the Korean company, which faced an initial loss to Apple at the ITC just last month -- even though large swaths of the mostly Android-based Galaxy phones and tablets in the dispute have long since left the market, an upheld verdict gives Samsung one less bargaining chip in a protracted legal war.