E04F 2201/041
Tongues or grooves with slits or cuts for expansion or flexibility
E04F2201/041 (Tongues or grooves with slits or cuts for expansion or flexibility) appears on 166 US grants and 183 published applications in this corpus.
Search patents in E04F- Granted patents
- 166
- Published applications
- 183
- Assignees
- 56
- Inventors
- 103
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 3 |
| 2003 | 2 | 5 |
| 2004 | 4 | 4 |
| 2005 | 3 | 5 |
| 2006 | 0 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 4 |
| 2009 | 3 | 3 |
| 2010 | 2 | 9 |
| 2011 | 4 | 7 |
| 2012 | 6 | 5 |
| 2013 | 8 | 7 |
| 2014 | 9 | 9 |
| 2015 | 9 | 8 |
| 2016 | 8 | 8 |
| 2017 | 7 | 8 |
| 2018 | 8 | 7 |
| 2019 | 8 | 10 |
| 2020 | 12 | 14 |
| 2021 | 10 | 16 |
| 2022 | 12 | 7 |
| 2023 | 11 | 15 |
| 2024 | 13 | 10 |
| 2025 | 9 | 10 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pretensioned mechanical locking device for building panels28 Apr 2026US 12,612,784 B2Välinge Innovation AB
- Panel7 Apr 2026US 12,595,666 B2Unilin BV
- Floor panel for forming a floor covering16 Dec 2025US 12,497,785 B2Unilin BV
- Panel with locking device23 Sep 2025US 12,421,737 B2Välinge Innovation AB
- Floor covering, floor element and method for manufacturing floor elements12 Aug 2025US 12,385,260 B2Unilin BV
- Panel with locking device19 Mar 2026US 2026/0078591 A1Välinge Innovation AB
- Floor panel for forming a floor covering12 Feb 2026US 2026/0043250 A1Unilin BV
- Panel15 Jan 2026US 2026/0015870 A1Unilin BV
- Vertical joint system and associated surface covering system28 Aug 2025US 2025/0270819 A1Välinge Innovation AB
- Floor panel for forming a floor covering28 Aug 2025US 2025/0270820 A1Unilin BV
Most cited
By later US patents
- Snap-together flooring system515US 5,295,341 ANikken Seattle, Inc. · 1994
- Panel elements407US 6,769,219 B2hulsta-Werke Huls GmbH & Co. KG · 2004
- Panel element365US 6,880,307 B2hulsta-Werke Huls GmbH & Co. KG · 2005
- Floor covering and locking systems245US 7,516,588 B2Valinge Aluminium AB · 2009
- Flooring material for building237US 5,540,025 ADaiken Trade & Industry Co., Ltd. · 1996