OrthoCor Medical, a Minnesota knee brace manufacturer, announced Tuesday that the U.S. Food and Drug Administration has cleared its Alleva line of heat and cold wraps for knee and lower back pain among other areas. With the FDA clearance, the products intended to alleviate pain in several areas, including the knee, lower back, ankle, wrist, elbow and neck, can be bought over the counter without a prescription. Target patients are those who suffer from arthritis or general pain. In late June, OrthoCor’s CEO John Dinusson said the company was seeking $3 million, $1 million of which had already been raised.