This landscape identifies 350 published records matching dry-electrode and solid-state cell terminology across the 2015-2026 window. That figure counts individual published documents rather than deduplicated patent families, so the same underlying invention may appear more than once across jurisdictions. The United States is the largest single receiving office at 122 records, followed by the European Patent Office and the WIPO PCT route.

The field has a defined leader holding 24 records, well ahead of the fifth-ranked assignee at 11 and tenth-ranked at 9. Together the five leading assignees account for 28.9% of all 350 records, and the ten leading assignees account for 42.9%. That still leaves more than half the field distributed across a long tail of assignees each holding only a handful of filings, so no single company controls the core architecture outright.

Filing activity peaked in 2020 at 29 records and has since declined, with 2021's 18 filings falling to 5 by 2024 — a -72% change over that three-year span. However, patent publication typically lags the actual filing date by around 18 months, so the 2025 and 2026 counts in any dataset are still incomplete. The honest read is a pullback from a 2020 peak, not a confirmed long-term decline, until later years finish publishing.

The overwhelming majority, 90.0% of the 350 records, carry the H01M classification for batteries, cells and fuel cells, confirming this is fundamentally battery-classified subject matter. Meaningful minorities also touch H01B (conductors and insulators, 8.3%), C23C (coatings and surface deposition, 7.1%), C03C (glass and enamel compositions, 5.4%) and smaller shares in capacitors, semiconductor devices, ceramics and metal compounds. Because a single record can carry several classes, these shares add up to more than 100% of the record total.

The classification spread suggests the densest claim territory sits squarely in core H01M battery architecture, while secondary classes tied to electrode coatings, glass-ceramic electrolyte compositions and conductor interfaces carry proportionally far fewer records. That gap does not guarantee an idea is patentable, but it does mean claim space around dry-process manufacturing equipment and specific interface coatings has not been as heavily staked out as the core cell structure. Co-filing is also rare, with only seven co-assignee pairs across the dataset, suggesting most innovation here is being developed and filed independently rather than jointly.