William Harry Barnes (1887 – 1945) – Hypophyscope 
William Henry Barnes, an ENT doctor at the Frederick Douglas Hospital in Philadelphia, was not only a pioneer in the field of medical device design and development but also credited with inventing the hypophyscope. Incorporating his expertise in medical device design and development, this innovative medical instrument was specifically designed to reach the pituitary gland on the brain’s underside. This gland secretes hormones into the bloodstream, and Barnes’ invention made it easier for doctors to access it. Although reaching the gland without any specialized medical device was possible, Barnes’ instrument greatly facilitated the procedure. In addition to inventing the hypophyscope, Barnes improved upon a method to remove tonsils without bleeding, refining the process for greater efficiency.