Resources are available for Florida residents to help inventors and entrepreneurs learn more about protecting their intellectual property. A patent foramen ovale occurs when a hole that is always present in a newborn's heart fails to close as it should once the lungs begin to function after birth.Easily file your provisional patent application in Florida, USA. Secure your invention with professional assistance and protect your intellectual property. A test called an echocardiogram is used to diagnose a PFO. The test uses sound waves to create pictures of the beating heart. Patent foramen ovale (PFO) is a hole between your heart's upper chambers. A patent foramen ovale is a small, flaplike opening in the wall between the upper chambers of the heart. (73) Filing an application without an attorney is possible, but even with some guidance it is definitely not without its challenges. Each patent application has several forms that must be filled out and submitted.