One assignee leads the ranked field with 462 records, well ahead of the fifth-place holder at 133. That said, the drop from fifth to tenth place (133 to 107) is gradual, meaning several companies file at broadly comparable volumes rather than a single runner-up chasing the leader. The full ranking covers 100 assignees, and the top 10 combined account for 24.4% of all 7,089 records in scope, so most of the field's activity sits outside the leadership group entirely.

Filings peaked in 2020 at 472 and then declined to 265 by 2024, a 40% drop over that three-year span using the only years complete enough to trust. Counts for 2025 and 2026 look much lower still, but that reflects the roughly 18-month lag between filing and publication rather than an actual collapse in activity. Anyone reading the most recent one or two years as a downtrend is likely reading incomplete data.

H05K (printed circuits and assemblies) covers 32.3% of the 7,089 records in scope, the single largest class, followed by H01L (semiconductor devices) at 17.8%. B32B (layered products) and C08L (polymer compositions) each sit at 11.5%, and H01R (connectors and current collectors) — the class most directly tied to connector hardware — is smaller still at 9.7%. This tells you claim pressure concentrates on what LCP parts connect to and how they're built up in layers, more than on the connector housing itself.

This filing, from Jiangmen Dezhongtai Engineering Plastics Technology, describes a specific manufacturing route: spinning LCP into fibers, weaving those fibers into cloth, then pressing and stretching the cloth into a film reported to exceed 170 MPa tensile strength. It blocks that particular spin-weave-press-stretch sequence for producing high-strength LCP film, not LCP film production generally. Alternative routes to similar mechanical properties — extrusion casting or different fiber-orientation methods, for instance — would need their own freedom-to-operate check against this and neighbouring filings.

The technology composition data shows connector-specific claims (H01R at 9.7%) are thinner than the classes describing adjacent uses of LCP, such as printed circuits (32.3%) and antennas (10.4%). Sub-areas like fine-pitch weld line reinforcement, low-dielectric-loss LCP for antenna substrates, and anisotropic shrinkage compensation in thin-wall molds show comparatively less filing density than the core chemistry and processing claims. These are reasonable places to run a targeted prior-art search before committing to a filing strategy.