The dataset behind this page ranks 19 assignees, and the leading company holds 13 of the 62 records in scope, well ahead of the fifth-ranked company’s 6. This gap indicates a leader with a broad filing programme rather than the field being split evenly among several equally-sized competitors. Anyone evaluating freedom to operate should look closely at the leader’s claim scope first, since it accounts for the largest single share of the ranked total.

Quite concentrated: the top 5 assignees together hold 67.7% of all 62 records in scope, and the top 10 extend that to 95.2%. That leaves a long tail of assignees each holding only a handful of records, which is typically where narrower, more specific claims — such as edge-sealing geometry or puncture protection layers — tend to sit, since the broader structural claims are already occupied by the leaders.

Building-structure integration (IPC class E04B) is the most common, touching 40.3% of the 62 records, followed by layered-product and laminate construction (B32B) at 35.5% and pipe-fitting applications (F16L) at 33.9%. Because a single patent can carry more than one IPC classification, these shares add up to more than 100% of records rather than representing separate slices of a whole. The pattern suggests filings are concentrated on how the panel is integrated into a structure or pipework, rather than on the internal vacuum core materials themselves.