This dataset’s assignee ranking contains only three companies, and together they account for all 48 records in scope. One assignee holds the clear majority of those records, with the remaining two holding smaller but still ranked shares. This is a fully concentrated field rather than one with a broad base of independent filers, so due diligence here means checking a short, specific list rather than scanning a long tail.

Filings peaked at 12 records in 2022 and had fallen to 4 by 2024, a decline of 33% over that three-year span. However, patent publication typically lags filing by around 18 months, so 2025 and 2026 figures in any dataset are still incomplete and should not yet be read as continued decline. The honest read is that the field passed a filing peak around 2022 and cooled into 2024, with the very latest trend still unresolved.

US9513129B2, assigned to The Boeing Company, claims a method and apparatus that generates a navigation solution by combining GPS and inertial navigation outputs, using a limiter that constrains how much a raw GPS-derived correction is allowed to adjust the inertial solution. In effect it bounds the authority GPS has over the inertial output, which is the technical basis for ‘low authority’ GPS aiding used to resist spoofing. Anyone building a tightly coupled fusion architecture with a correction-limiting step should check this claim scope directly rather than assume it only covers anti-spoofing use cases narrowly.