E04F 21/08
Mechanical implements
Official title: Mechanical implements (E04F21/14 takes precedence; spraying in general B05B; sand-blasting B24C)
E04F21/08 (Mechanical implements) appears on 455 US grants and 383 published applications in this corpus.
Search patents in E04F- Granted patents
- 455
- Published applications
- 383
- Assignees
- 161
- Inventors
- 648
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 7 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 8 | 0 |
| 1998 | 4 | 0 |
| 1999 | 14 | 0 |
| 2000 | 15 | 0 |
| 2001 | 11 | 3 |
| 2002 | 15 | 8 |
| 2003 | 12 | 10 |
| 2004 | 12 | 19 |
| 2005 | 4 | 13 |
| 2006 | 7 | 22 |
| 2007 | 10 | 18 |
| 2008 | 4 | 12 |
| 2009 | 11 | 16 |
| 2010 | 16 | 20 |
| 2011 | 17 | 24 |
| 2012 | 18 | 9 |
| 2013 | 15 | 15 |
| 2014 | 18 | 17 |
| 2015 | 8 | 11 |
| 2016 | 12 | 12 |
| 2017 | 9 | 11 |
| 2018 | 12 | 17 |
| 2019 | 14 | 17 |
| 2020 | 21 | 17 |
| 2021 | 11 | 15 |
| 2022 | 13 | 14 |
| 2023 | 8 | 17 |
| 2024 | 20 | 19 |
| 2025 | 13 | 18 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adjustable notched trowel1 Sep 2026US 12,723,414 B2
- Automated wall finishing system and method25 Aug 2026US 12,716,247 B2JLG Industries, Inc.
- Tile butterer16 Jun 2026US 12,655,644 B1
- Gunite feed system9 Jun 2026US 12,649,259 B2
- Plasterboard finishing tools21 Apr 2026US 12,607,023 B2Tape-Pro Drywall Tools Pty Limited
- Automated wall finishing system and method1 Oct 2026US 2026/0297963 A1JLG Industries, Inc.
- Systems for and methods of preparing loosefill insulation material9 Jul 2026US 2026/0194083 A1CertainTeed Corporation
- Surface finish quality evaluation system and method25 Jun 2026US 2026/0175445 A1JLG Industries, Inc.
- Insulation installation system and method of installing insulation in a wall structure for a modular construction unit7 May 2026US 2026/0124705 A1Buildz, LLC
- Tool for installing insulation16 Apr 2026US 2026/0103901 A1CertainTeed Corporation
Most cited
By later US patents
- Purgeable dispensing gun for polyurethane foam and the like137US 4,117,551 A1978
- Pressure operated spray applicator97US 4,961,537 ADJS&T Limited Partnership · 1990
- Manually adjustable spray applicator84US 5,188,295 ADJS&T Limited Partnership · 1993
- Manually adjustable spray applicator82US 4,955,545 ADJS&T Limited Partnership · 1990
- Manually adjustable spray applicator82US 5,069,390 ADJ S & T Limited Partnership · 1991