E04G 21/10
Devices for levelling
Official title: Devices for levelling, e.g. templates or boards (smoothing tools E04F21/16, E04F21/24)
E04G21/10 (Devices for levelling) appears on 189 US grants and 120 published applications in this corpus.
Search patents in E04G- Granted patents
- 189
- Published applications
- 120
- Assignees
- 66
- Inventors
- 247
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 9 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 2 |
| 2004 | 4 | 5 |
| 2005 | 4 | 1 |
| 2006 | 2 | 4 |
| 2007 | 3 | 5 |
| 2008 | 1 | 1 |
| 2009 | 1 | 4 |
| 2010 | 4 | 5 |
| 2011 | 1 | 4 |
| 2012 | 4 | 4 |
| 2013 | 3 | 2 |
| 2014 | 3 | 4 |
| 2015 | 3 | 0 |
| 2016 | 2 | 3 |
| 2017 | 5 | 3 |
| 2018 | 5 | 6 |
| 2019 | 6 | 7 |
| 2020 | 5 | 10 |
| 2021 | 5 | 8 |
| 2022 | 1 | 12 |
| 2023 | 9 | 9 |
| 2024 | 4 | 10 |
| 2025 | 7 | 7 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electronically actuated leveling system for screeding concrete14 Jul 2026US 12,680,240 B2Ligchine International Corporation
- Concrete screeding depth and leveling tool12 May 2026US 12,624,560 B2Whitetail Management LLC
- Concrete working tool and kit for making the same28 Apr 2026US 12,612,792 B2
- Swing boom concrete screeding apparatus20 Jan 2026US 12,529,194 B2Ligchine International Corporation
- Modular concrete tool9 Dec 2025US 12,491,616 B2Milwaukee Electric Tool Corporation
- Manual concrete finishing tools and components for use therewith23 Jul 2026US 2026/0210133 A1Baron Innovative Technology LP
- Drive-in boom screed23 Jul 2026US 2026/0210135 A1Ligchine International Corporation
- Device for floating wet concrete edges to grade and related methods5 Mar 2026US 2026/0062934 A1
- Wide Swath Offset Concrete Screed9 Oct 2025US 2025/0314022 A1Dragon Screed LLC
- Swing boom concrete screeding apparatus17 Jul 2025US 2025/0230615 A1Ligchine International Corporation
Most cited
By later US patents
- Screeding apparatus and method86US 4,655,633 A1987
- Screed ski and support system and method59US 6,866,445 B22005
- Method for screeding cement58US 4,115,976 AJohn Rohrer Contracting Company · 1978
- Ride-type surface-working machines56US 3,936,212 A1976
- Material-leveling apparatus45US 5,375,942 ALindley Incorporated · 1994