The assignee ranking in this dataset covers 100 companies counted by patent family, with the leading filer holding 37 records. The top 5 filers together account for 23.0% of the 548 records in scope, and the top 10 account for 35.0%, which means concentration exists at the top but a long tail of smaller filers still holds the majority of the field. Filers named in the ranking include aerospace, additive-manufacturing equipment, and national-lab entities, reflecting the technology's roots in both aerospace metal parts and academic/government research.

Yes, based on complete years: filings grew from 50 in 2021 to 95 in 2024, a 90% increase over that three-year span, and 2024 is the most recent year that can be treated as a complete data point. Figures for 2025 and 2026 look lower only because publication lags filing by roughly 18 months, so those years are still filling in rather than showing a real slowdown. Anyone using the recent tail to judge momentum should treat it as a floor, not a signal of declining interest.

Powder metallurgy (IPC class B22F) and additive manufacturing / 3D printing (B33Y) are by far the most claimed, appearing on 71.9% and 69.9% of the 548 records respectively. Welding, soldering and brazing (B23K) and alloy composition (C22C) follow as substantial secondary classes at 36.3% and 20.8%. Digital data processing, ceramics/clay shaping, and materials testing classes each cover under 5% of records, marking them as comparatively under-claimed relative to the core process and materials classes.

The United States leads as a receiving office with 209 records, ahead of the European Patent Office (91), China (81), the WIPO PCT route (69), India (26) and Germany (11) in this dataset. This spread indicates the technology is being protected across the major industrial patent offices rather than concentrated in a single jurisdiction, consistent with a technology used across aerospace, medical device and industrial manufacturing supply chains that span multiple regions.

US12397376B2, assigned to RTX Corporation and granted 2025-08-26, claims an off-axis laser beam measurement system combining a repositionable beam measurement device, a positioning apparatus, and a control system that determines where to measure the beam profile. It specifically blocks off-axis beam-profiling setups that pair automated repositioning with a control loop deciding measurement position — it does not cover coaxial melt-pool imaging, which is a separate and more heavily cited line of prior art in this dataset, nor fixed-position beam measurement installations. Anyone building an off-axis, repositionable measurement feature for an LPBF system should review this claim set closely; other sensing approaches have more room.

The clearest under-claimed branches by IPC coverage are digital data processing (G06F, 4.6% of 548 records), materials testing and analysis (G01N, 4.0%), and ceramics/clay-adjacent shaping (B28B, 4.4%) — all well below the 70%+ coverage of the core powder and additive-manufacturing classes. This points to opportunity in quality-inference and post-process inspection methods rather than in the build-process hardware itself, where filing density is already high. A first claim in this space would likely be framed as a data-processing or testing method rather than an apparatus claim, since the apparatus space is comparatively crowded.