E04F 21/20
Implements for finishing work on buildings: for laying flooring
Official title: for laying flooring (made of similar material to roads or pavements E01C {; arrangements for removing of previously fixed floor covering E04G23/00})
E04F21/20 (Implements for finishing work on buildings: for laying flooring) appears on 941 US grants and 826 published applications in this corpus.
Search patents in E04F- Granted patents
- 941
- Published applications
- 826
- Assignees
- 315
- Inventors
- 1,257
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 7 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 9 | 0 |
| 1983 | 6 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 8 | 0 |
| 1987 | 9 | 0 |
| 1988 | 19 | 0 |
| 1989 | 20 | 0 |
| 1990 | 13 | 0 |
| 1991 | 10 | 0 |
| 1992 | 8 | 0 |
| 1993 | 15 | 0 |
| 1994 | 6 | 0 |
| 1995 | 18 | 0 |
| 1996 | 8 | 0 |
| 1997 | 17 | 0 |
| 1998 | 21 | 0 |
| 1999 | 22 | 0 |
| 2000 | 25 | 0 |
| 2001 | 15 | 5 |
| 2002 | 18 | 26 |
| 2003 | 23 | 21 |
| 2004 | 23 | 19 |
| 2005 | 18 | 32 |
| 2006 | 27 | 35 |
| 2007 | 18 | 24 |
| 2008 | 17 | 30 |
| 2009 | 18 | 28 |
| 2010 | 17 | 32 |
| 2011 | 19 | 23 |
| 2012 | 19 | 14 |
| 2013 | 27 | 23 |
| 2014 | 20 | 25 |
| 2015 | 26 | 34 |
| 2016 | 34 | 27 |
| 2017 | 28 | 33 |
| 2018 | 26 | 40 |
| 2019 | 41 | 33 |
| 2020 | 34 | 48 |
| 2021 | 31 | 48 |
| 2022 | 30 | 62 |
| 2023 | 37 | 56 |
| 2024 | 39 | 43 |
| 2025 | 38 | 27 |
| 2026 | 26 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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.
- Attachment for screeding concrete15 Sep 2026US 12,735,904 B2Meinders Concrete Construction, Inc.
- Battery pack powered trowel including blade pitch and speed control4 Aug 2026US 12,698,636 B2Milwaukee Electric Tool Corporation
- Connector clip for deck boards21 Jul 2026US 12,686,105 B2Trex Company, Inc.
- Fastener installation tool and method of fastening boards therewith1 Oct 2026US 2026/0295787 A1Trex Company, Inc.
- Methods and systems for pattern oriented tile installation24 Sep 2026US 2026/0286720 A1
- Concrete forming tool24 Sep 2026US 2026/0286721 A1Bull Force Concrete Products LLC
- Concrete trowel17 Sep 2026US 2026/0275733 A1Milwaukee Electric Tool Corporation
- Device for aligning tiles10 Sep 2026US 2026/0266066 A1Mgr Inz. Joanna Chudy "Glas-Hit" Eksport Import
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
- Portable dance floor201US 5,465,546 A1995
- Tile spacer and leveler196US 7,257,926 B12007
- Mechanical locking of floor panels with a flexible tongue188US 8,341,915 B2Välinge Innovation AB · 2013