B43L 23/02
Sharpeners for pencils or leads: with gearing
Official title: with gearing
B43L23/02 (Sharpeners for pencils or leads: with gearing) appears on 69 US grants and 71 published applications in this corpus.
Search patents in B43L- Granted patents
- 69
- Published applications
- 71
- Assignees
- 35
- Inventors
- 120
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 1 |
| 2003 | 1 | 2 |
| 2004 | 1 | 2 |
| 2005 | 2 | 1 |
| 2006 | 1 | 7 |
| 2007 | 4 | 5 |
| 2008 | 2 | 9 |
| 2009 | 4 | 2 |
| 2010 | 4 | 4 |
| 2011 | 3 | 7 |
| 2012 | 4 | 1 |
| 2013 | 2 | 4 |
| 2014 | 0 | 2 |
| 2015 | 0 | 3 |
| 2016 | 2 | 0 |
| 2017 | 3 | 5 |
| 2018 | 2 | 4 |
| 2019 | 4 | 4 |
| 2020 | 3 | 0 |
| 2021 | 1 | 0 |
| 2022 | 2 | 2 |
| 2023 | 1 | 2 |
| 2024 | 2 | 1 |
| 2025 | 2 | 0 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Sharpener with heating element1 Aug 2023US 11,712,919 B2
- 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
- Crayon cutter12 Mar 2026US 2026/0070369 A1Crayola LLC
- Sharpeners for writing instruments7 Mar 2024US 2024/0075766 A1Sanford, L. P.
- Sharpener with variable heating element7 Dec 2023US 2023/0391132 A1
Most cited
By later US patents
- Sucking on device which is easily to be lifted but is not easily getting overturned26US 5,076,527 A1991
- Pencil sharpener25US 6,886,614 B2Hunt Holdings, Inc. · 2005
- Pencil sharpener22US 4,966,208 A1990
- Pencil sharpener19US 6,470,929 B2Hunt Holdings, Inc. · 2002
- Pencil sharpener19US 7,134,461 B2KTF Corporation · 2006