One assignee leads the ranked group with 15 of the 96 records in scope, well ahead of the fifth-ranked filer at 8. The top 5 of 30 ranked assignees together hold 58.3% of all records, and the top 10 extend that to 89.6%, so the field is concentrated among a small set of national labs, defence-linked research organisations and instrumentation companies rather than spread evenly across many filers. A new entrant should expect to compete directly with an entrenched leadership group rather than find open ground at the top of the ranking.

Filings climbed from 6 in 2017 to a peak of 9 in 2023, then fell to 4 by 2024, a 43% decline over the 2021-2024 window. That said, publication typically lags filing by around 18 months, so the apparent drop in 2025 and 2026 is partly an artefact of records not yet having published rather than firms stepping back from the technology. The honest read is that the 2023 peak marked a high point and the field has since settled to a lower but still active filing rate.

US12392611B1, filed by National Technology & Engineering Solutions of Sandia, LLC and published in August 2025, claims a two-step measurement protocol for an evanescent-field-mode guided atom interferometer accelerometer. It combines a pathfinder step using revival of atomic coherence to capture a broad interferometric signature with a second high-precision guided measurement step tuned using the parameters from the first. It is one of the more recent filings in this dataset and is specific to guided, evanescent-field atom trapping rather than free-fall interferometer geometries, so it does not block approaches built on free-fall cold-atom drops.