B41J 23/32
Electromagnetic power drives
Official title: Electromagnetic power drives, e.g. applied to key levers
B41J23/32 (Electromagnetic power drives) appears on 32 US grants and 21 published applications in this corpus.
Search patents in B41J- Granted patents
- 32
- Published applications
- 21
- Assignees
- 20
- Inventors
- 59
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 3 | 8 |
| 2018 | 6 | 3 |
| 2019 | 1 | 1 |
| 2020 | 2 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 2 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Printing error detection15 Apr 2025US 12,277,354 B2Hewlett-Packard Development Company, L. P.
- Printing error detection25 Apr 2023US 11,635,924 B2Hewlett-Packard Development Company, L. P.
- Paper processing device14 Sep 2021US 11,117,400 B2Primax Electronics Ltd.
- Power supply device, conveyance apparatus, and image forming apparatus24 Nov 2020US 10,843,495 B2Ricoh Company, Ltd.
- Image forming apparatus and image forming system including clutch and controller which controls whether clutch allows drive force to be transmitted to driving member18 Feb 2020US 10,562,327 B2Brother Kogyo Kabushiki Kaisha
- Printing error detection6 Jul 2023US 2023/0214160 A1Hewlett-Packard Development Company, L. P.
- Printing apparatus24 Nov 2022US 2022/0371344 A1Roland Dg Corporation
- Printing error detection10 Mar 2022US 2022/0072883 A1Hewlett-Packard Development Company, L. P.
- Paper processing device13 May 2021US 2021/0138808 A1Primax Electronics Ltd.
- Power supply device, conveyance apparatus, and image forming apparatus2 Apr 2020US 2020/0101775 A1Ricoh Company, Ltd.
Most cited
By later US patents
- Keyboard actuatable with the aid of the fingers of at least one hand48US 4,201,489 ACreatcchnil Patent AG · 1980
- Keyboard actuable with the aid of the fingers of at least one hand28US 4,081,068 A1978
- Clam shell printer26US 6,088,049 AIntermec IP Corp. · 2000
- Printer with an integrally formed spring for biasing the printhead17US 6,068,420 AIntermec IP Corp. · 2000
- Printer for printing on media roll16US 5,751,330 AIntermec Corporation · 1998