Display Glass Substrate Patents: Top Companies & Filing Trends 2026
Display Glass Substrate Manufacturing Patents: Who Files, What They Claim
96.6% concentration. The top five assignees account for 1,217 of the 1,260 records in scope — this field is claimed by a handful of firms, not a broad field of entrants. Filings peaked at 140 in 2017. The most recent complete comparison shows 2021 (59) to 2024 (49), a -17% change; 2025 and 2026 counts are understated because publication typically lags filing by around 18 months.
- 1CORNING INC1,104
- 2POLYPLUS BATTERY CO INC46
- 3CORSAM TECHNOLOGIES LLC26
- 4AGC INC21
- 5AVANSTRATE INC20
See the full display glass substrate manufacturing analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
Who holds the most patents in display glass substrate manufacturing?
One assignee dominates this dataset, holding 1,104 of the 1,260 records in scope, compared with 20 records at fifth place and 5 at tenth. This means the field is best understood as one large portfolio surrounded by a long tail of much smaller filers rather than a competitive field of similarly sized players. Any competitive or freedom-to-operate analysis should treat that leading portfolio as the primary reference point.
Is patent filing in display glass substrates increasing or decreasing?
Filing peaked in 2017 at 140 records and had eased to 49 by 2024, a -17% change from the 2021 figure of 59. Counts for 2025 and 2026 are lower still, but that reflects normal publication lag of roughly 18 months rather than an actual drop in R&D activity. The honest read is a claim base that has matured past its most active filing years, not one that has gone quiet.
What technology areas get the most patent claims in this space?
Glass and enamel compositions (IPC class C03C) appear on 72.5% of the 1,260 records, making it by far the densest claim area, ahead of glass manufacture and shaping (C03B, 33.7%) and layered products and laminates (B32B, 18.7%). Because records often carry multiple IPC codes, these figures overlap rather than sum to 100%. A new filing that only changes forming equipment while reusing a claimed composition is filing into the most crowded part of the field.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Display Glass Substrate Manufacturing covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.