B24B 3/52
Of shear blades or scissors
Official title: of shear blades or scissors
B24B3/52 (Of shear blades or scissors) appears on 50 US grants and 39 published applications in this corpus.
Search patents in B24B- Granted patents
- 50
- Published applications
- 39
- Assignees
- 22
- Inventors
- 66
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 3 |
| 2012 | 2 | 0 |
| 2013 | 2 | 0 |
| 2014 | 4 | 2 |
| 2015 | 1 | 3 |
| 2016 | 2 | 0 |
| 2017 | 2 | 2 |
| 2018 | 4 | 5 |
| 2019 | 2 | 2 |
| 2020 | 3 | 6 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 4 | 2 |
| 2024 | 1 | 2 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Knife sharpening device9 Dec 2025US 12,491,598 B2Yong Yi International Holding Co., Ltd. Taiwan Branch
- Systems and methods for conditioning blades10 Jun 2025US 12,325,105 B2Wolff Industries, Inc.
- Rotatable edge guide to support a cutting tool during a sharpening operation30 Jul 2024US 12,048,979 B2Darex, LLC
- Arrangement for grinding edged tools5 Dec 2023US 11,833,639 B2Tormek AB
- Knife and tool sharpener28 Nov 2023US 11,826,869 B2Edgecraft Corporation
- Device and Method for Sharpening A Serrated Blade26 Mar 2026US 2026/0084258 A1
- Systems and methods for conditioning blades21 Aug 2025US 2025/0262716 A1Wolff Industries, Inc.
- Device and method for facilitating the sharpening of nail nippers23 Jan 2025US 2025/0025976 A1Startool, Inc.
- Knife sharpening device24 Oct 2024US 2024/0351155 A1Ke M.O. House Co., Ltd.
- Rotatable edge guide to support a cutting tool during a sharpening operation17 Oct 2024US 2024/0342848 A1Darex, LLC
Most cited
By later US patents
- Method and apparatus for knife and blade sharpening68US 4,627,194 A1986
- Methods and apparatus for knife and blade sharpening58US 4,716,689 A1988
- Scissor sharpening apparatus with magnetic guide44US 5,148,634 AEdgecraft Corporation · 1992
- Cutting tool sharpener41US 8,696,407 B2Darex, LLC · 2014
- Method and apparatus for sharpening curved blades24US 5,667,427 ABettcher Industries, Inc. · 1997