E04F 21/163
With exchangeable blades
Official title: {with exchangeable blades}
E04F21/163 (With exchangeable blades) appears on 61 US grants and 56 published applications in this corpus.
Search patents in E04F- Granted patents
- 61
- Published applications
- 56
- Assignees
- 20
- Inventors
- 98
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 3 |
| 2006 | 1 | 3 |
| 2007 | 1 | 3 |
| 2008 | 2 | 4 |
| 2009 | 1 | 5 |
| 2010 | 6 | 1 |
| 2011 | 0 | 0 |
| 2012 | 4 | 3 |
| 2013 | 4 | 3 |
| 2014 | 2 | 1 |
| 2015 | 2 | 5 |
| 2016 | 3 | 2 |
| 2017 | 1 | 1 |
| 2018 | 3 | 1 |
| 2019 | 2 | 3 |
| 2020 | 3 | 2 |
| 2021 | 1 | 3 |
| 2022 | 0 | 2 |
| 2023 | 2 | 4 |
| 2024 | 3 | 3 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Manual concrete finishing tools and components for use therewith23 Jul 2026US 2026/0210133 A1Baron Innovative Technology LP
- Taping knife handle, and taping knife provided with such a handle11 Jul 2024US 2024/0229476 A9Etablissements Pierre Grehal Et Cie SA
- Taping knife handle, and taping knife provided with such a handle25 Apr 2024US 2024/0133187 A1Etablissements Pierre Grehal Et Cie SA
- Apparatus and system for surface processing of plastically deformable masses14 Mar 2024US 2024/0084606 A1PLANUM Int. AG
- Mounting Adapter for Concrete Surface Processing Tools30 Nov 2023US 2023/0383551 A1Wagman Metal Products, Inc.
Most cited
By later US patents