There is potential for conspiracy gold in a 2018 patent filed by aerospace engineer Dr. Salvatore Cezar Pais, who works for the Naval Air Warfare Center Aircraft Division, a research organization within the Navy that specializes in electromagnetic drives and superconductors.
The patent (US10144532B2) describes "a craft using an inertial mass reduction device comprises of an inner resonant cavity wall, an outer resonant cavity, and microwave emitters. The electrically charged outer resonant cavity wall and the electrically insulated inner resonant cavity wall form a resonant cavity. The microwave emitters create high-frequency electromagnetic waves throughout the resonant cavity causing the resonant cavity to vibrate in an accelerated mode and create a local polarized vacuum outside the outer resonant cavity wall."
The shape of this plane is one that resembles a flying triangle.
In August of 2019, The Drive filed Freedom of Information Act requests with the Navy to shed more light on the patent. While it's still unknown if those requests have been answered, further investigation through the U.S. Patent and Trademark Office's (USPTO) Public Patent Application Information Retrieval database revealed that superconductors and the electromagnetic field generator, may in fact, already be in operation in some manner.
If the technologies described in the patent are already operational, does this mean the Navy is building UFOs?