B41J 2/28
Of spring charge type, i.e. with mechanical power under electro-magnetic control
Official title: of spring charge type, i.e. with mechanical power under electro-magnetic control
B41J2/28 (Of spring charge type, i.e. with mechanical power under electro-magnetic control) appears on 97 US grants and 2 published applications in this corpus.
Search patents in B41J- Granted patents
- 97
- Published applications
- 2
- Assignees
- 40
- Inventors
- 147
- Latest grant
- 23 Nov 2004
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 12 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 6 | 0 |
| 1989 | 8 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Line printer with staggered magnetics23 Nov 2004US 6,821,035 B2Printronix, Inc.
- Needle printing head13 May 2003US 6,561,707 B2Compuprint SpA
- Printing apparatus and method11 Aug 1998US 5,793,392 A
- Electromechanical actuator used in wire-dot printing head10 Mar 1998US 5,726,521 AFujitsu Limited
- Print actuator14 Oct 1997US 5,676,474 AInternational Business Machines Corporation
Most cited
By later US patents
- Dot printer head with reduced magnetic interference118US 4,537,520 ATokyo Electric Co., Ltd. · 1985
- Print hammer mechanism32US 4,044,668 APrintronix, Inc. · 1977
- Segmented-ring magnet print head31US 4,225,250 ATally Corporation · 1980
- Printing apparatus and method27US 5,793,392 A1998
- Print head having a wear resistant rotational fulcrum22US 4,802,776 AHitachi, Ltd. · 1989