Interference occurs when one lidar unit’s laser pulses arrive at another unit’s receiver and get mistaken for legitimate echoes, producing false detections or missed targets. This becomes more likely as vehicle and infrastructure density rises and multiple units illuminate overlapping fields of view. The patent filings in this space address it primarily through pulse coding schemes, randomized emission timing, and crosstalk mitigation circuitry that let a receiver distinguish its own reflected pulses from another unit’s emissions.

The ranking covers 37 companies, with the leading assignee holding 11 of the 87 records in scope and a steep drop to 7 at fifth place and 4 at tenth. Filers span dedicated lidar and radar makers, wireless-infrastructure vendors, and university research groups, several of which co-file with industrial partners. The top 10 combined account for 77.0% of all records, so most competitive tracking can start there before widening the net.

Filings peaked at 11 in 2020 and declined through the following years, falling from 8 in 2021 to 2 in 2024 — a -75% drop over that span, based on the last year of data considered complete. Counts for 2025 and 2026 are still low, but that reflects the roughly 18-month lag between filing and publication rather than a confirmed drop in activity. A clearer read on the most recent period will only be possible once those years finish publishing.