B43K 21/16
With stepwise feed of writing-cores
Official title: with stepwise feed of writing-cores
B43K21/16 (With stepwise feed of writing-cores) appears on 126 US grants and 56 published applications in this corpus.
Search patents in B43K- Granted patents
- 126
- Published applications
- 56
- Assignees
- 30
- Inventors
- 125
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 7 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 4 |
| 2008 | 3 | 2 |
| 2009 | 1 | 1 |
| 2010 | 4 | 6 |
| 2011 | 2 | 3 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 3 |
| 2015 | 1 | 7 |
| 2016 | 4 | 1 |
| 2017 | 5 | 1 |
| 2018 | 1 | 4 |
| 2019 | 5 | 6 |
| 2020 | 3 | 3 |
| 2021 | 0 | 2 |
| 2022 | 2 | 3 |
| 2023 | 0 | 0 |
| 2024 | 4 | 2 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Replaceable cartridge for a writing instrument and method thereof12 May 2026US 12,623,482 B2Societe BIC
- Mechanical pencil26 Nov 2024US 12,151,503 B2Wenzhou Tianjiao Pen Industrial Co., Ltd.
- Rear-pressing anti-misoperation double-ended eyebrow pencil8 Oct 2024US 12,108,864 B1Shya Hsin Packaging Industry (China) Co., Ltd.
- Mechanical pencil28 May 2024US 11,993,097 B2Kabushiki Kaisha Pilot Corporation
- Mechanical pencil30 Jan 2024US 11,884,093 B2Mitsubishi Pencil Company, Limited
- Mechanical pencil5 Feb 2026US 2026/0034828 A1Mitsubishi Pencil Company, Limited
- A replaceable cartridge for a writing instrument and method thereof9 Jan 2025US 2025/0010654 A1Societe BIC
- Rear-pressing anti-misoperation double-ended eyebrow pencil10 Oct 2024US 2024/0335022 A1Shya Hsin Packaging Industry (China) Co., Ltd.
- Mechanical pencil28 Mar 2024US 2024/0100877 A1Wenzhou Tianjiao Pen Industrial Co., Ltd.
- Mechanical pencil29 Dec 2022US 2022/0410614 A1KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)
Most cited
By later US patents
- Card type writing instrument32US 4,815,880 AZebra Co., Ltd. · 1989
- Side-knock type mechanical pencil29US 6,065,889 APentel Kabushiki Kaisha · 2000
- Mechanical pencil with removable lead feed cover23US 4,500,220 APentel Kabushiki Kaisha · 1985
- Crayon holder23US 5,048,989 A1991
- Mechanical pencil with chuck closing by normal writing grip21US 4,270,870 AAncos Co., Ltd. · 1981