Leeseberg & Valentine medical malpractice lawyers. With a combined 70 years of experience in the Columbus, Ohio area, the attorneys at Leeseberg & Valentine are ready and willing to help you if you have a medical malpractice, personal injury or product liability case in Franklin County or surrounding areas. When our law firm was established 20 years ago, our mission statement was based on representing people who suffered serious harm because of negligent and careless drivers, physicians who committed medical malpractice, and manufacturers of dangerous products, along with other types of irresponsible behavior. That was our law firm's mission then, and it remains our mission today.