B41J 2002/17579
Measuring electrical impedance for ink level indication
Official title: {Measuring electrical impedance for ink level indication}
B41J2002/17579 (Measuring electrical impedance for ink level indication) appears on 285 US grants and 286 published applications in this corpus.
Search patents in B41J- Granted patents
- 285
- Published applications
- 286
- Assignees
- 40
- Inventors
- 494
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 6 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 1 |
| 2002 | 3 | 2 |
| 2003 | 5 | 2 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 8 |
| 2008 | 0 | 3 |
| 2009 | 4 | 11 |
| 2010 | 7 | 1 |
| 2011 | 2 | 6 |
| 2012 | 3 | 6 |
| 2013 | 8 | 6 |
| 2014 | 9 | 7 |
| 2015 | 4 | 9 |
| 2016 | 13 | 17 |
| 2017 | 13 | 15 |
| 2018 | 13 | 17 |
| 2019 | 18 | 30 |
| 2020 | 31 | 27 |
| 2021 | 19 | 30 |
| 2022 | 22 | 30 |
| 2023 | 25 | 23 |
| 2024 | 16 | 16 |
| 2025 | 16 | 10 |
| 2026 | 9 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Replaceable ink cartridge having surface wiring resistance pattern271US 5,506,611 ACanon Kabushiki Kaisha · 1996
- Ink jet recording apparatus constructed to detect a properly mounted ink cartridge152US 6,062,667 ACanon Kabushiki Kaisha · 2000
- Replaceable ink cartridge150US 5,509,140 ACanon Kabushiki Kaisha · 1996
- Ink jet with residual ink detection that compensates for different ink properties105US 5,162,817 ACanon Kabushiki Kaisha · 1992
- Liquid level sensor for ink jet printers89US 5,583,544 AVideojet Systems International, Inc. · 1996