E04F 2201/0529
The interlocking key acting as a dovetail-type key
Official title: the interlocking key acting as a dovetail-type key
E04F2201/0529 (The interlocking key acting as a dovetail-type key) appears on 57 US grants and 58 published applications in this corpus.
Search patents in E04F- Granted patents
- 57
- Published applications
- 58
- Assignees
- 20
- Inventors
- 47
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 2 |
| 2003 | 1 | 1 |
| 2004 | 3 | 3 |
| 2005 | 2 | 2 |
| 2006 | 1 | 1 |
| 2007 | 2 | 3 |
| 2008 | 3 | 1 |
| 2009 | 1 | 4 |
| 2010 | 1 | 1 |
| 2011 | 2 | 3 |
| 2012 | 0 | 3 |
| 2013 | 1 | 0 |
| 2014 | 3 | 5 |
| 2015 | 5 | 4 |
| 2016 | 4 | 3 |
| 2017 | 2 | 3 |
| 2018 | 4 | 1 |
| 2019 | 3 | 3 |
| 2020 | 3 | 4 |
| 2021 | 4 | 5 |
| 2022 | 2 | 1 |
| 2023 | 1 | 2 |
| 2024 | 2 | 1 |
| 2025 | 2 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Interlocking panels with v-shaped seams10 Mar 2026US 12,571,216 B1Westlake Royal Building Products (USA) Inc.
- Floor covering, floor element and method for manufacturing floor elements12 Aug 2025US 12,385,260 B2Unilin BV
- Linkable tiles for covering a surface25 Feb 2025US 12,234,653 B2
- Mechanical locking of floor panels2 Jul 2024US 12,024,898 B2Välinge Innovation AB
- Floor covering, floor element and method for manufacturing floor elements19 Mar 2024US 11,933,055 B2Unilin BV
- Floor covering, floor element and method for manufacturing floor elements10 Apr 2025US 2025/0116122 A1Unilin BV
- Floor covering, floor element and method for manufacturing floor elements30 May 2024US 2024/0175271 A1Unilin BV
- Floor Covering, Floor Element and Method for Manufacturing Floor Elements22 Jun 2023US 2023/0193637 A1Flooring Industries Limited, Sarl
- Linkable Tiles for Covering a Surface9 Feb 2023US 2023/0045702 A1
- Mechanical locking of floor panels12 May 2022US 2022/0143718 A1Välinge Innovation AB
Most cited
By later US patents
- Artificial skating-rink floor456US 4,169,688 A1979
- Thermoplastic planks and methods for making the same450US 6,617,009 B1Mannington Mills, Inc. · 2003
- Flooring material comprising flooring elements which are assembled by means of separate joining elements406US 6,763,643 B1Pergo (Europe) AB · 2004
- Arrangement of building elements with connecting means235US 7,377,081 B2Kaindl Flooring GmbH · 2008
- Flooring product193US 5,179,812 AFlourlock (UK) Limited · 1993