One assignee leads the ranking with 67 records, noticeably ahead of the fifth-placed filer at 22 and the tenth-placed filer at 13. The top five assignees together account for 190 of the 646 records in scope, or 29.4%, and the top ten account for 272, or 42.1%. That leaves well over half the field spread across a long tail of assignees with only one or a handful of filings each, so the space is concentrated at the top but not closed to new entrants.

Filing volume peaked in 2023 at 94 records and, on the last fully comparable window, fell from 63 filings in 2021 to 44 in 2024 — a 30% decline. Because patent publication typically lags filing by about eighteen months, the 2025 and 2026 figures in any dataset will look artificially low and should not yet be read as confirmation the decline is continuing. The safest reading is that filing has passed its 2023 peak and is normalising, not that the technology area is losing investment.

The two largest IPC subclasses are G05D, control of non-electric variables, at 39.6% of the 646 records, and B25J, manipulators and robots, at 33.6%. Navigation-related G01C and data-processing G06F both sit in the low-to-mid teens, while AI-model class G06N and image-processing class G06T each account for under 10%. Because a single record can carry several classes, these shares add up to more than 100% and should be read as an indicator of where claim density sits, not as mutually exclusive buckets.

The lightest-claimed adjacent branches in this dataset are the classes sitting below 10% of the 646 records: G06N (AI-model-based computing), G06T (image data processing) and H04L (digital information transmission), all of which are technically adjacent to the dominant G05D and B25J control and manipulation claims. A first claim that ties an AI-based planning or fleet-telemetry function directly to a physical navigation or actuator-control step is more likely to land in less-crowded prior art than a pure navigation or manipulator claim on its own. This should be treated as a starting hypothesis for a targeted prior-art search, not a guarantee of allowability.

The United States leads with 271 tracked filings, followed by the European Patent Office at 104, India at 70, the WIPO/PCT route at 54, China at 37 and Germany at 27. This distribution suggests applicants are prioritising US and European protection directly, with PCT used as a secondary or bridging route rather than the primary filing strategy. Anyone benchmarking regional competitive activity should weight the US and EPO figures most heavily given their volume relative to the other offices tracked.