E04F 21/22
Of single elements
Official title: of single elements, e.g. flooring cramps {; flexible webs (cutting tiles B28D1/225)}
E04F21/22 (Of single elements) appears on 353 US grants and 334 published applications in this corpus.
Search patents in E04F- Granted patents
- 353
- Published applications
- 334
- Assignees
- 122
- Inventors
- 471
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 7 | 0 |
| 1994 | 0 | 0 |
| 1995 | 8 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 11 | 0 |
| 1999 | 9 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 2 |
| 2002 | 4 | 8 |
| 2003 | 5 | 6 |
| 2004 | 3 | 4 |
| 2005 | 5 | 10 |
| 2006 | 5 | 12 |
| 2007 | 5 | 9 |
| 2008 | 5 | 13 |
| 2009 | 5 | 8 |
| 2010 | 5 | 9 |
| 2011 | 9 | 7 |
| 2012 | 7 | 8 |
| 2013 | 14 | 12 |
| 2014 | 13 | 16 |
| 2015 | 11 | 20 |
| 2016 | 18 | 13 |
| 2017 | 8 | 15 |
| 2018 | 10 | 13 |
| 2019 | 16 | 14 |
| 2020 | 17 | 20 |
| 2021 | 18 | 21 |
| 2022 | 10 | 30 |
| 2023 | 20 | 24 |
| 2024 | 21 | 10 |
| 2025 | 18 | 12 |
| 2026 | 10 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ceramic tile leveling bracket, pushing and clamping pliers, and ceramic tile leveling and laying system6 Oct 2026US 12,753,615 B2Hangzhou Great Star Industrial Co., Ltd.
- Plug cutting tool and related method of use15 Sep 2026US 12,734,594 B2National Nail Corp.
- Connector clip for deck boards21 Jul 2026US 12,686,105 B2Trex Company, Inc.
- Tile leveler21 Apr 2026US 12,607,024 B2
- Construction tool24 Mar 2026US 12,583,090 B21406239 BC Ltd.
- Fastener installation tool and method of fastening boards therewith1 Oct 2026US 2026/0295787 A1Trex Company, Inc.
- Device for aligning tiles10 Sep 2026US 2026/0266066 A1Mgr Inz. Joanna Chudy "Glas-Hit" Eksport Import
- Device for Leveling and Aligning Tiles and Method for Leveling and Aligning Tiles11 Jun 2026US 2026/0160075 A1Acufloor, LLC
- Device for Leveling and Aligning Tiles and Method for Leveling and Aligning Tiles11 Jun 2026US 2026/0160076 A1Acufloor, LLC
- Device for Leveling and Aligning Tiles and Method for Leveling and Aligning Tiles11 Jun 2026US 2026/0160077 A1Acufloor, LLC
Most cited
By later US patents
- Joint320US 6,332,733 B1Hamberger Industriewerke GmbH · 2001
- Mechanical locking system for panels and method of installing same268US 7,841,145 B2Välinge Innovation AB · 2010
- Tile spacer and leveler196US 7,257,926 B12007
- Mechanical locking of floor panels with a flexible tongue188US 8,341,915 B2Välinge Innovation AB · 2013
- Mechanical locking of floor panels with a flexible tongue169US 8,381,477 B2Välinge Innovation AB · 2013