The assignee ranking for this dataset returns 21 companies across the 78 records in scope, and it is not a top-50 or top-100 cut — it is the full ranked list the data endpoint returns. Within that list, concentration is steep: the top 5 combined hold 73.1% of all 78 records, and the top 10 combined hold 94.9%. That leaves a thin tail of single or low-count filers beyond the tenth-ranked assignee, which held 2 records.

Filing activity peaked at 19 records in 2021 and stood at 18 in 2024, a -5% change over that span — essentially a plateau rather than growth or decline. Because publication lags filing by roughly 18 months, the 2025 and 2026 figures in any trend chart are still incomplete and will revise upward. The safest read is that the field held its filing rate through the last fully-reported year rather than accelerating or cooling.

92.3% of the 78 records carry a G06N classification, covering computing based on AI models, which signals that most claims are framed around sequence selection, optimisation or verification methods rather than pulse-generation hardware itself. Coding and code conversion (H03M) and general transmission (H04B) each appear in under 12% of records, and hardware-adjacent classes like pulse technique (H03K) or nanotechnology applications (B82Y) barely register. A filer targeting hardware-level pulse generation is working in a much less crowded class than one targeting algorithmic sequence selection.

Rarely, based on this dataset. Only two co-assignee pairs appear across all 78 records, the strongest being a university paired with a research institute on four shared records, and a second pair linking a corporate parent with its national subsidiary on three records. Most filings in this space are single-assignee, which suggests the technique is being developed and filed largely in-house rather than through joint ventures or shared research grants.

The class-level data points to hardware-adjacent branches as the least crowded: pulse technique and logic circuits (H03K) appear in only 2.6% of records, and nanotechnology applications (B82Y), geophysics-linked sensing (G01V) and optical control (G02F) each appear in a single record. These are not proven-safe white space — a single record can still block a narrow claim — but they carry far less filing density than the dominant G06N computing class, where 92.3% of records and a concentrated top-5 assignee group make new claims harder to clear.