E04F 2201/03
Undercut connections
Official title: Undercut connections, e.g. using undercut tongues or grooves
E04F2201/03 (Undercut connections) appears on 121 US grants and 159 published applications in this corpus.
Search patents in E04F- Granted patents
- 121
- Published applications
- 159
- Assignees
- 55
- Inventors
- 110
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 0 | 5 |
| 2004 | 1 | 7 |
| 2005 | 1 | 6 |
| 2006 | 1 | 3 |
| 2007 | 0 | 5 |
| 2008 | 3 | 5 |
| 2009 | 1 | 4 |
| 2010 | 4 | 5 |
| 2011 | 4 | 2 |
| 2012 | 5 | 10 |
| 2013 | 5 | 5 |
| 2014 | 8 | 8 |
| 2015 | 7 | 5 |
| 2016 | 5 | 6 |
| 2017 | 5 | 7 |
| 2018 | 8 | 8 |
| 2019 | 8 | 10 |
| 2020 | 10 | 8 |
| 2021 | 7 | 9 |
| 2022 | 8 | 5 |
| 2023 | 7 | 13 |
| 2024 | 8 | 7 |
| 2025 | 5 | 5 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Temporary walkway system with modular tiles interlocking in three-dimensions15 Sep 2026US 12,735,846 B2Plastic Safety Systems, Inc.
- Floor panel and floor12 May 2026US 12,624,553 B2i4F Licensing NV
- Panel12 May 2026US 12,624,554 B2Unilin Nordic AB
- Pretensioned mechanical locking device for building panels28 Apr 2026US 12,612,784 B2Välinge Innovation AB
- Seep-resistant panel28 Apr 2026US 12,612,788 B2Akzenta Paneele + Profile GmbH
- A joint for wall panels made of cross laminated timber6 Aug 2026US 2026/0226733 A1Clt Factory, Sia
- Fully assembled storage room18 Jun 2026US 2026/0168233 A1Zhejiang Shedex Industrial and Trading Co., Ltd.
- Reinforcing structure of toolshed18 Jun 2026US 2026/0168235 A1Zhejiang Shedex Industrial and Trading Co., Ltd.
- Connecting structure between wall panels and wall panel assemmbly18 Jun 2026US 2026/0168242 A1Zhejiang Shedex Industrial and Trading Co., Ltd.
- Assembly of bottom plate and wall panel18 Jun 2026US 2026/0168244 A1Zhejiang Shedex Industrial and Trading Co., Ltd.
Most cited
By later US patents
- Flooring system388US 5,797,237 AStandard Plywoods, Incorporated · 1998
- Panel and fastening system for such a panel290US 7,451,578 B2Akzenta Paneele + Profile GmbH · 2008
- Mechanical locking system for floor panels251US 7,454,875 B2Valinge Aluminium AB · 2008
- Mechanical locking system for floor panels172US 7,980,041 B2Välinge Innovation AB · 2011
- Mechanical locking system for floor panels154US 8,181,416 B2Välinge Innovation AB · 2012