B43L 23/00
Sharpeners for pencils or leads
Official title: Sharpeners for pencils or leads (grinding or cutting tools in general B24; B26; combined with writing implements B43K29/06)
B43L23/00 (Sharpeners for pencils or leads) appears on 228 US grants and 199 published applications in this corpus.
Search patents in B43L- Granted patents
- 228
- Published applications
- 199
- Assignees
- 89
- Inventors
- 348
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 0 | 0 |
| 1988 | 7 | 0 |
| 1989 | 1 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 2 |
| 2002 | 14 | 5 |
| 2003 | 6 | 5 |
| 2004 | 4 | 10 |
| 2005 | 12 | 15 |
| 2006 | 5 | 15 |
| 2007 | 8 | 19 |
| 2008 | 6 | 17 |
| 2009 | 8 | 8 |
| 2010 | 6 | 7 |
| 2011 | 7 | 12 |
| 2012 | 7 | 6 |
| 2013 | 4 | 6 |
| 2014 | 7 | 8 |
| 2015 | 2 | 9 |
| 2016 | 7 | 4 |
| 2017 | 5 | 10 |
| 2018 | 4 | 8 |
| 2019 | 7 | 9 |
| 2020 | 6 | 3 |
| 2021 | 5 | 4 |
| 2022 | 7 | 5 |
| 2023 | 3 | 2 |
| 2024 | 4 | 2 |
| 2025 | 3 | 1 |
| 2026 | 0 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B43L 23/08In which the pencils or leads are sharpened mainly by rotational movement122
- B43L 23/02Sharpeners for pencils or leads: with gearing69
- B43L 23/008Sharpeners for pencils or leads: with rotating cutting bodies55
- B43L 23/06In which the pencils or leads are sharpened by only axial movement21
- B43L 23/002Sharpeners for pencils or leads: with continuous conveying means for the pencil11
- B43L 23/004Sharpeners for pencils or leads: with radial cutting blades4
- B43L 23/006Sharpeners for pencils or leads: with rasping surfaces4
Recent patents
- Cosmetic pencil sharpener23 Dec 2025US 12,502,908 B2
- Sharpener with variable heating element9 Dec 2025US 12,491,727 B2
- Electric pencil sharpener with delay function10 Jun 2025US 12,325,258 B2Dongguan In-Mind Technology Co., Ltd.
- Sharpeners for writing instruments1 Oct 2024US 12,103,330 B2Sanford, L. P.
- Pencil sharpener4 Jun 2024US 11,999,185 B2
- Fire shaver17 Sep 2026US 2026/0273795 A1Outdoor Element, LLC
- Shaving compression mechanism of pencil sharpener, and pencil sharpener9 Jul 2026US 2026/0192592 A1Ningbo Tiantian Stationery Co., Ltd.
- Pencil Clamping Mechanism for Pencil Sharpener26 Mar 2026US 2026/0084458 A1Deli Group Co. Ltd
- Pencil feeding mechanism and pencil sharpener provided with pencil feeding mechanism26 Mar 2026US 2026/0084459 A1Deli Group Co. Ltd
- Crayon cutter12 Mar 2026US 2026/0070369 A1Crayola LLC
Most cited
By later US patents