E04D 3/352

At least one insulating layer being located between non-insulating layers

Official title: {at least one insulating layer being located between non-insulating layers, e.g. double skin slabs or sheets}

E04D3/352 (At least one insulating layer being located between non-insulating layers) appears on 197 US grants and 184 published applications in this corpus.

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Granted patents
197
Published applications
184
Assignees
114
Inventors
337
Latest grant
7 Jul 2026

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E04D 3/352: granted patents and published applications per publication year
YearGranted patentsPublished applications
197620
197750
1978110
197920
198030
198140
198240
198350
1984100
198530
198630
198750
198820
198910
199030
199140
199210
199320
199420
199530
199600
199730
199830
199910
200030
200110
200203
200303
200435
200536
200613
200712
200838
2009210
201047
201147
201276
201378
2014312
201578
201634
201759
2018612
2019614
2020710
2021712
202247
2023915
2024115
202556
202632

By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.