Between 2015 and 2019, Dr. Salvatore Cezar Pais — a working aerospace engineer at the U.S. Navy's Naval Air Warfare Center Aircraft Division (NAWCAD) at Patuxent River, Maryland — filed five U.S. patents on behalf of the Department of the Navy. Their stated capabilities, in the order they were filed, are:

1. ◆A handheld device that generates a high-energy electromagnetic field strong enough to deflect inbound asteroids.
2. ◆A "hybrid aerospace/undersea craft" that uses an inertial mass reduction device to operate, by the patent's own language, "without the use of conventional propellants" — and which "could engineer the fabric of our reality at the most fundamental level."
3. ◆A high-frequency gravitational wave generator the size of a softball.
4. ◆A room-temperature superconductor activated by piezoelectric vibration.
5. ◆A plasma compression fusion device that achieves net energy gain in a desktop form factor.

If any one of these worked, it would constitute a Nobel Prize in physics. If all five worked, they would represent a level of technological discontinuity comparable to the entire twentieth century compressed into a four-year filing window at a single Maryland Navy installation, by a single inventor, working on what is, by Pentagon standards, a very small budget.

None of them have been publicly demonstrated. The Navy spent over $500,000 between 2016 and 2019 attempting to verify the underlying "Pais Effect" — the claimed mechanism behind multiple patents — and NAWCAD concluded that the effect could not be proven. Several of the patents have since expired due to non-payment of maintenance fees, which is the patent system's way of saying the assignee is not actively pursuing commercialization.

What's harder to dismiss is the underlying paperwork. The Navy filed these patents. The Navy's Chief Technology Officer at the time, Dr. James Sheehy, personally certified to the U.S. Patent and Trademark Office that the inertial mass reduction device was "operable and enabling" — meaning, in patent-law terms, that the device works as described and that one of skill in the art could build it from the specification. That certification is what makes the Pais patent set substantively different from any other "anti-gravity inventor" who has ever filed paperwork in a hopeful basement. The U.S. Department of the Navy, on its institutional letterhead, certified to the federal patent office that this technology is real.

This post walks through what each patent actually claims, what the institutional record around them looks like, and what to make of the contradiction between "the Navy certified them" and "the Navy spent half a million dollars and couldn't prove the underlying effect."

Salvatore Pais holds a PhD in mechanical and aerospace engineering from Case Western Reserve University (2002). His dissertation was on Bose-Einstein condensates as related to plasma physics. Before joining NAWCAD, he held positions at NASA Glenn Research Center and Walt Disney Imagineering's R&D arm. He published peer-reviewed papers in aerospace propulsion journals before the patent series began.

He is, in other words, not a credential-free outsider. He is a working PhD-level federal aerospace engineer with a publication record. The standard "ignore the basement crank" reflex is not available here.

What makes Pais's patent series unusual is not his credentials but the scope of his claims. The five patents collectively describe a technology stack that, if it worked, would produce a craft consistent with every reported UAP behavior — instantaneous acceleration, anti-gravity lift, transmedium travel, hypersonic velocity without thermal signature, low observability. The patents read, almost suspiciously cleanly, as a reverse-engineering specification of what would be required to build something like a Tic Tac.

• ◆Filed: April 28, 2015
• ◆Granted: November 20, 2018
• ◆Patent number: US10135366B2 (applied for as US20160164451A1 — "Electromagnetic Field Generator and Method to Generate an Electromagnetic Field")
• ◆Common name: HEEMFG (High Energy Electromagnetic Field Generator)

The HEEMFG describes a handheld device combining accelerated rotation, accelerated vibration, and accelerated linear motion of a charged surface to produce a localized electromagnetic field of "extreme intensity." The patent's stated principal application is planetary defense — generating an EM field strong enough to deflect inbound asteroids. Secondary applications include "active electromagnetic shielding" of military assets and possible propulsion.

The novel claim is that combined acceleration of the same charged element — rotation plus vibration plus linear translation — produces field intensities not achievable by any one mode separately. No conventional electromagnetic theory predicts the kind of field strength Pais claims; conventional theory predicts the field would be ordinary and dependent only on the linear acceleration of the charge, with rotation and vibration adding nothing meaningful.

This is the foundational patent of the series — the "Pais Effect" mechanism it implies (combined accelerations producing anomalous physics) is what the later patents apply.

• ◆Filed: April 28, 2016
• ◆Granted: December 4, 2018
• ◆Patent number: US10144532B2
• ◆Title: "Craft Using an Inertial Mass Reduction Device"

This is the document that put Pais on the popular UAP map. The patent describes a hybrid aerospace/undersea craft — a triangular or conical vehicle capable of operating in air, in water, and in space, with no external propulsion. Operation is via "generation of high-frequency gravitational waves and high-frequency electromagnetic waves" that locally reduce the inertial mass of the craft and the surrounding medium, creating what the patent calls a "vacuum energy region" that the craft moves through.

Quoting the patent directly (a sentence widely cited in coverage of the document):

"It is possible to envision a craft that can fly in air like an airplane, slip through water like a submarine, glide over the surface of water like a sea-skimmer, and maneuver underwater like a submarine."

The structural details specified in the patent — conical body, electromagnetic resonance chamber, no external moving parts, capable of transmedium operation — match observational descriptions of the USS Nimitz Tic Tac (2004) and USS Omaha Transmedium Sphere (2019) closely enough that the resemblance has been remarked on by multiple commentators.

The Sheehy certification is the part that distinguishes this patent. Patent examiners will routinely reject applications that violate accepted physics. When the USPTO initially rejected the Pais filing on those grounds, Dr. James Sheehy — at the time, NAWCAD's Chief Technology Officer — wrote a formal letter attesting that the patent was operable, citing apparent Chinese research progress on similar technologies as the reason the Navy needed the IP secured immediately. The patent was granted on the basis of Sheehy's certification.

That letter is the actual extraordinary document in this story. Patent law's "enablement requirement" is normally adjudicated technically; an institutional CTO certifying as a matter of national interest that an apparent perpetual-motion machine works is not how patent prosecution is conducted in the routine case. It happened here. It is the part of the Pais patent record that is institutionally hardest to explain away.

• ◆Filed: May 22, 2017
• ◆Granted: June 18, 2019
• ◆Patent number: US10322827B2
• ◆Title: "High Frequency Gravitational Wave Generator"

This patent describes a softball-sized device that generates gravitational waves at frequencies in the GHz to THz range — the "high frequency" regime that, in mainstream gravitational physics, is theoretically interesting but not currently producible at any scale. LIGO detects gravitational waves at sub-kilohertz frequencies emitted by colliding black holes; the Pais device claims to generate waves at frequencies thousands of times higher in a tabletop apparatus.

If this device worked, it would constitute the most consequential physics result since the discovery of the cosmic microwave background. There is no public demonstration. The patent has expired due to non-payment of maintenance fees.

• ◆Filed: August 17, 2017
• ◆Application: US20190058105A1
• ◆Title: "Piezoelectricity-Induced Room Temperature Superconductor"

A room-temperature superconductor, if real, would be a Nobel-grade discovery. Pais's claim is that piezoelectric vibration of a specific material at specific frequencies produces superconductivity at standard temperatures and pressures. The patent does not specify the material in falsifiable detail.

The Navy's actual reproducibility study of the Pais Effect — conducted at NAWCAD between 2017 and 2019 with a budget of ~$500,000 — focused on this patent's predictions among others. NAWCAD's internal documents conclude that the effect was not reproduced. Some of the test work was, per FOIA-released documents, conducted in collaboration with a Chinese research lab — a collaboration choice that has drawn its own scrutiny.

• ◆Filed: April 25, 2018
• ◆Application: US20190295733A1
• ◆Status: Abandoned (the application was not pursued through to grant)
• ◆Title: "Plasma Compression Fusion Device"

The most ambitious of the five — a tabletop fusion reactor with continuous net energy gain. Achieved via the same underlying combined-accelerations mechanism. National laboratories with billion-dollar budgets (NIF, ITER) have spent decades pursuing fusion ignition; ITER will not produce energy gain before the 2030s on its current schedule. Pais's patent claims to produce ignition with a few hundred kilowatts of input on a desktop.

The patent application was abandoned, which under U.S. patent procedure means the assignee declined to respond to USPTO office actions. This is a strong institutional signal that, even by the Navy's own internal metrics, the technology was not progressing toward demonstration.

Across the five patents, three institutional facts are uncontested in the public record:

1. ◆The Navy filed them. They are real U.S. patents, owned by the U.S. Government as represented by the Secretary of the Navy.
2. ◆The Navy CTO personally certified at least the inertial mass reduction patent as operable and enabling.
3. ◆The Navy spent more than $500,000 trying to verify the underlying effect and did not succeed, after which the patents were either expired or abandoned.

These three facts do not fit comfortably together. If the underlying physics didn't work, why did NAWCAD's CTO formally certify operability under penalty of perjury? If the underlying physics did work, why did the Navy abandon prosecution and let the patents lapse?

The available explanations, ordered by parsimony:

1. ◆

   The patents were filed defensively. The Navy believed Chinese research was approaching similar capabilities and wanted to secure U.S. IP coverage in case the technology became real, even if it wasn't real yet. Sheehy's certification was, on this reading, a strategic statement rather than a technical attestation. Patents lapsed when the perceived Chinese threat did not materialize at the scale anticipated.

2. ◆

   The Navy thought there was something there — anomalous results that didn't fit standard physics — and wanted IP coverage in case the underlying effect could eventually be reproduced. The reproducibility study failed at the budgets allocated; the Navy decided to stop spending money rather than invest more without intermediate results.

3. ◆

   Pais was generating real (if marginal) experimental results that the Navy found too anomalous to dismiss but too unreliable to commit to. The patent record is a hedge against the small probability that he was right.

4. ◆

   The patents are smokescreen. The actual exotic-propulsion work, if any, is being done somewhere else; the Pais patents exist to sit in the public IP record as a misdirection while real classified work proceeds. This reading is harder to support evidentially but is structurally consistent with how state secrecy operates in other contexts.

The site does not adjudicate among these. The first explanation is the most institutionally defensible; the fourth is the most popular in UAP discourse; the second and third sit uncomfortably between.

The Pais set is the most prominent but not the only relevant Navy / DoD intellectual property in the broad "exotic propulsion" or "UAP-adjacent" category. A non-exhaustive list, included here for completeness:

• ◆

  The AATIP DIRDs (Defense Intelligence Reference Documents) — not patents, but DoD-commissioned technical reports authored between 2008 and 2010, primarily by Hal Puthoff's EarthTech and other contractors. Topics include traversable wormholes, warp-drive propulsion, antigravity for aerospace, metric engineering, and high-frequency gravitational waves. The DIRDs predate the Pais patents by several years and cover much of the same speculative-physics territory.

• ◆

  The Wilson-Davis memo (alleged) — purportedly summarizes a 2002 conversation between physicist Eric Davis and Admiral Thomas Wilson about a "deeply black" UAP retrieval program operating outside Congressional oversight. Not a patent, but the Pais patent series operates structurally as the patent-record half of what the Wilson-Davis memo describes as the retrieval-program half. Whether either is fully accurate is contested; the Pais patents at least verifiably exist.

• ◆

  TR-3B speculation — there is no actual TR-3B patent. The aircraft commonly referred to under that name (a triangular black-budget aircraft allegedly using nuclear-MHD propulsion) is unsupported in the public record by any patent filing or procurement document. Coverage to the contrary in popular UAP literature is not corroborated by USPTO filings.

• ◆

  Boeing and Northrop Grumman have filed several patents over the years on classified-program-adjacent technologies (advanced electromagnetic shielding, exotic ejector systems, low-observability surfaces). None match the scope or specificity of the Pais set.

• ◆

  Tesla-era patents (Nikola Tesla, assigned 1900–1918) on directed energy, wireless power, and rotating magnetic fields are routinely cited in UAP literature as theoretical antecedents. They are real, public, expired, and primarily of historical rather than operational interest.

Pais sits, like several other figures profiled on this site (Lazar, Greer, Grebennikov), on the line where credentials and contested claims meet. Unlike Lazar's Area 51 narrative, Pais's claims are at least documentary — the patents are real, filed at the USPTO with publicly accessible specifications, certified by named federal officials with verifiable positions. Unlike Grebennikov, Pais's institutional position is current and Western, not Soviet-era and remote. Unlike Greer's CE-5 framework, Pais's claims are mechanical rather than experiential.

But unlike a successfully demonstrated technology, none of Pais's claims have been independently reproduced. The Navy's own reproducibility study failed. Pais himself, since late 2024 public comments, has continued to defend the underlying physics but has not produced a working demonstration.

The most honest position is the institutional one. The patents are documented. The Sheehy certification is documented. The reproducibility study is documented. The patent abandonments and expirations are documented. Whether the underlying physics is real is what remains contested — and unlike most contested UAP claims, this one has institutional records on both sides.

For AUSPEX readers who want to track Pais's work over time, the Justia patent search for Salvatore Cezar Pais is the canonical updating index. New filings, if any, will appear there.

Critical journalism (the most rigorous external coverage):

• ◆The Drive's War Zone — Brett Tingley and Tyler Rogoway have produced the most comprehensive critical reporting on the Pais patents. Notable: the original "operable and enabling" letter coverage, the $500K reproducibility study, the China-lab collaboration.
• ◆The Debrief's Salvatore Pais's Mysterious 'UFO patents': What Do They Really Mean? (2024 update on patent status)
• ◆Big Think's U.S. Navy controls inventions that claim to change "fabric of reality"

Primary sources (free):

• ◆The patents themselves at Google Patents:
  • ◆US10135366B2 — Electromagnetic Field Generator (HEEMFG)
  • ◆US10144532B2 — Craft Using an Inertial Mass Reduction Device
  • ◆US10322827B2 — High Frequency Gravitational Wave Generator
  • ◆US20190058105A1 — Room Temperature Superconductor
  • ◆US20190295733A1 — Plasma Compression Fusion Device
• ◆NAVAIR FOIA reading room — Pais patent file (PAX 205) — the Navy-released Inertial Mass Reduction Device documentation
• ◆Justia: All Pais filings — updated index

Adjacent UAP / disclosure books:

• ◆Luis Elizondo, Imminent: Inside the Pentagon's Hunt for UFOs (William Morrow, 2024) — discusses the Pais patents from inside AATIP's institutional context — Bookshop · Amazon
• ◆Ross Coulthart, In Plain Sight (HarperCollins, 2021) — covers the Pais patents in the context of the broader crash-retrieval / reverse-engineering claims — Bookshop · Amazon
• ◆Annie Jacobsen, Phenomena: The Secret History of the U.S. Government's Investigations into Extrasensory Perception and Psychokinesis (Little, Brown, 2017) — covers the parallel DoD interest in exotic-physics research that produced the AATIP DIRDs — Bookshop · Amazon

AUSPEX cross-references:

• ◆The anti-gravity-lift, transmedium-travel, and instantaneous-acceleration observables that Pais's craft patent specifies — The Five Observables
• ◆The Pais patents as a "documented" entry in the time-displacement / exotic-propulsion index — Time Travel module
• ◆The post-2017 disclosure context — Pentagon UAP Disclosure Timeline
• ◆An alternative anti-gravity claimant on the credibility line — Viktor Grebennikov

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