E06B 3/221

With the frame member having local reinforcements in some parts of its

Official title: {with the frame member having local reinforcements in some parts of its cross-section or with a filled cavity}

E06B3/221 (With the frame member having local reinforcements in some parts of its) appears on 122 US grants and 97 published applications in this corpus.

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Granted patents
122
Published applications
97
Assignees
95
Inventors
254
Latest grant
18 Aug 2026

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E06B 3/221: granted patents and published applications per publication year
YearGranted patentsPublished applications
197620
197700
197800
197900
198020
198130
198210
198320
198420
198530
198610
198720
198830
198950
199040
199120
199220
199310
199400
199520
199660
199730
199820
199930
200030
200110
200253
200314
200434
200533
200602
200711
200803
200903
201006
201113
201221
201322
201442
201506
201630
201746
201835
201924
202067
202157
202243
202379
202459
202524
202640

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

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