B41J 9/24
Electromagnetic means
B41J9/24 (Electromagnetic means) appears on 9 US grants and 0 published applications in this corpus.
Search patents in B41J- Granted patents
- 9
- Published applications
- 0
- Assignees
- 8
- Inventors
- 13
- Latest grant
- 6 Sep 1994
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Printer hammerbank with low reluctance magnetics6 Sep 1994US 5,344,242 APrintronix, Inc.
- Matrix printing head with forward and return articulated-armature magnets29 Sep 1992US 5,150,976 ASiemens Nixdorf Informationssysteme Aktiengesellschaft
- Matrix printing head with pivotable armatures29 Jan 1991US 4,988,223 AProtechno Ces GmbH & Co Kg
- Print hammer mechanism1 Aug 1989US 4,852,481 A
- Type face striking system in an office writing machine27 Jun 1989US 4,842,429 AAEG Olympia Aktiengesellschaft
No published applications in this class yet.
Most cited
By later US patents
- Matrix printing head with pivotable armatures19US 4,988,223 AProtechno Ces GmbH & Co Kg · 1991
- Impact printing apparatus and method using reluctance switching and a closed loop drive system14US 4,273,039 AHewlett-Packard Company · 1981
- Printer11US 4,189,997 ACanon Kabushiki Kaisha · 1980
- Fast impact hammer for high speed printer9US 4,522,122 ANCR Canada Ltd - NCR Canada Ltee · 1985
- Magnetic hysteresis driven recording element and method6US 4,221,163 ANCR Corporation · 1980