The ranking of 100 assignees shows a clear leader with 304 records, well ahead of the fifth-ranked company at 46 and the tenth-ranked company at 30. Together the top five hold 43.9% of the 1,935 records in scope, and the top ten hold 53.1%. That means over half the field’s patenting activity concentrates in just ten organisations, while the remaining ninety ranked companies split the rest, often with single-digit or single-filing counts.

Filing peaked in 2018 at 271 records and has declined since, with the 2021-to-2024 window showing a 51% drop from 219 to 108 filings. Both those years are past the roughly 18-month publication lag, so the decline is a genuine trend rather than a data artefact. Figures for 2025 and 2026 are still incomplete and should not be read as a continuation of the decline until later filings publish.

G06F (electric digital data processing) and H04L (digital information transmission) are the two largest IPC subclasses, covering 27.8% and 23.8% of the 1,935 records respectively. Core control-and-regulating-systems claims under G05B account for 17.6%, and vehicle-control class B60W for 16.3%. Because a single record can carry multiple IPC classes, these shares add up to more than 100%, and the pattern suggests much of the recent claim-writing sits in data-handling and communications layers rather than in control-loop logic itself.