B43K 8/03
Ink reservoirs
Official title: Ink reservoirs; Ink cartridges
B43K8/03 (Ink reservoirs) appears on 142 US grants and 173 published applications in this corpus.
Search patents in B43K- Granted patents
- 142
- Published applications
- 173
- Assignees
- 82
- Inventors
- 283
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 5 | 4 |
| 2003 | 4 | 4 |
| 2004 | 5 | 5 |
| 2005 | 1 | 7 |
| 2006 | 6 | 3 |
| 2007 | 4 | 5 |
| 2008 | 1 | 4 |
| 2009 | 1 | 7 |
| 2010 | 2 | 8 |
| 2011 | 4 | 4 |
| 2012 | 2 | 5 |
| 2013 | 6 | 11 |
| 2014 | 4 | 6 |
| 2015 | 8 | 9 |
| 2016 | 9 | 10 |
| 2017 | 7 | 8 |
| 2018 | 10 | 5 |
| 2019 | 7 | 10 |
| 2020 | 5 | 10 |
| 2021 | 8 | 12 |
| 2022 | 6 | 12 |
| 2023 | 11 | 4 |
| 2024 | 6 | 6 |
| 2025 | 9 | 9 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Replaceable cartridge for a writing instrument and method thereof12 May 2026US 12,623,482 B2Societe BIC
- Dry erase inks, and associated methods and writing instruments24 Jun 2025US 12,338,352 B2Sanford, L. P.
- Writing instrument10 Jun 2025US 12,325,255 B2Mitsubishi Pencil Company, Limited
- Liquid storage member for coating tools15 Apr 2025US 12,275,215 B2Mitsubishi Pencil Company, Limited
- Variable color shade marker18 Mar 2025US 12,251,959 B2BIC Violex Single Member S.A.
- Applicator16 Jul 2026US 2026/0199932 A1Mitsubishi Pencil Company, Limited
- Writing instrument refill25 Jun 2026US 2026/0175613 A1KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)
- Plug structure, liquid cartridge, and pen30 Apr 2026US 2026/0116118 A1Lion Pencil Co., Ltd.
- Liquid storage member for coating tools20 Nov 2025US 2025/0353319 A1Mitsubishi Pencil Company, Limited
- Attachment structure in writing instrument, writing instrument, and soft member30 Oct 2025US 2025/0332858 A1KABUSHIKI KAISHA PILOT CORPORATION (also trading as PILOT CORPORATION)
Most cited
By later US patents
- Multicolor writing and painting instruments with multiple, bundled, hard, wear-resistant nibs106US 8,403,577 B2University of Southern California · 2013
- Efficient fluid dispensing utensil96US 6,322,268 B1Avery Dennison Corporation · 2001
- Polyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefrom74US 5,620,641 AAmerican Filtrona Corporation · 1997
- Polyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefrom73US 5,607,766 AAmerican Filtrona Corporation · 1997
- Polyethylene terephthalate sheath/thermoplastic polymer core bicomponent fibers, method of making same and products formed therefrom67US 5,633,082 AAmerican Filtrona Corporation · 1997