Salvatore Cezar Pais

Salvatore Cezar Pais is a US Navy aerospace engineer who worked as a scientist and aerospace engineer at the United States Navy's Naval Air Station Patuxent River. Between 2016 and 2019, he filed a series of extraordinary patents on behalf of the Naval Air Warfare Center. In June 2019, he left the NAWCAD and moved to the US Navy's Strategic Systems Programs organization.

The Pais patents attracted widespread attention for describing propulsion concepts reminiscent of reported UAP flight characteristics. These patents describe technologies including a craft using an inertial mass reduction device, a high-energy electromagnetic field generator, and a room-temperature superconductor.

The practical feasibility of the Pais patents remains debated. The craft using an inertial mass reduction device, filed in 2016, describes one embodiment that could be a high speed hybrid aerospace/undersea craft able to engineer the fabric of our reality at the most fundamental level. The patent application was supported by the Naval Aviation Enterprise's chief technical officer on the grounds that the Chinese military were already developing similar technology. The patent was approved and published on December 4, 2018, and expired on January 9th, 2023 due to non-payment of maintenance fees.