E04D 3/351

At least one of the layers being composed of insulating material

Official title: {at least one of the layers being composed of insulating material, e.g. fibre or foam material}

E04D3/351 (At least one of the layers being composed of insulating material) appears on 300 US grants and 290 published applications in this corpus.

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Granted patents
300
Published applications
290
Assignees
154
Inventors
490
Latest grant
7 Jul 2026

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E04D 3/351: granted patents and published applications per publication year
YearGranted patentsPublished applications
197630
197770
1978130
197920
198040
198180
198250
198380
1984100
198550
198660
1987100
198820
198920
199080
199140
199210
199340
199420
199530
199600
199740
199840
199910
200030
200110
200204
200304
200437
200539
200618
200723
2008311
2009311
2010914
2011712
2012109
2013913
20141020
20151012
2016812
20171213
20181020
20191022
20201213
20211020
2022815
20231317
2024177
202569
202645

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

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Granted patents