One assignee leads clearly with 985 records, well ahead of the fifth-ranked filer at 450 and the tenth at 131. The top five assignees combined account for 63.8% of all 5,399 records in scope, and the top ten account for 78.1%. This means the field has a dominant leader plus a small cluster of major filers, with a long tail of smaller entrants below tenth place holding comparatively few records each.

Filings peaked in 2021 at 1,079 and had fallen to 621 by 2024, a 42% decline over that span — the last year with reasonably complete data. Figures for 2025 and 2026 look lower still, but that reflects publication lag of roughly 18 months rather than an actual drop in filing activity. The honest read is a cooling from a 2021 peak, not a field in retreat.

It covers the full pipeline from capturing a 3D scene to delivering it as a decodable bitstream: geometry coding (frequently via octree structures), attribute coding for colour and texture, level-of-detail schemes for progressive rendering, viewport-dependent delivery for streaming, and camera calibration linking capture to encoding. In IPC terms, the bulk of records classify under H04N (pictorial communication, 66.1% of records) and G06T (image data processing, 59.7%), reflecting the field’s roots in video and image coding extended to 3D structures.