Twin Cities Business November 30, 2012 Every year, nearly 20 million U.S. citizens visit their doctor complaining of knee pain. Many try treatments ranging from medication to physical therapy in an attempt to avoid invasive knee surgery. Recently, doctors have been suggesting a new option: an OrthoCor Medical-made brace that eases knee pain with pulsed electromagnetic field therapy. Founded in 2007, OrthoCor has made it to the finish line in its mission to win over patients, doctors, the U.S. Food and Drug Administration (FDA), investors, and insurers with its brace. Since late summer, sales reps have been pounding the pavement…