G11B 5/325
Erasing heads using permanent magnets
Official title: Erasing heads using permanent magnets (general details therefor G11B5/133 - G11B5/255)
G11B5/325 (Erasing heads using permanent magnets) appears on 17 US grants and 3 published applications in this corpus.
Search patents in G11B- Granted patents
- 17
- Published applications
- 3
- Assignees
- 12
- Inventors
- 35
- Latest grant
- 12 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Data storage drive with dedicated erase transducer12 Mar 2024US 11,929,104 B2Seagate Technology LLC
- Tape erase element included in a tape erase device to erase a tape medium5 Dec 2023US 11,837,263 B1International Business Machines Corporation
- Magnetic head12 Nov 2019US 10,475,472 B2Insurgo Media Services Ltd
- Data erasure apparatus and data erasure method12 Jan 2010US 7,646,579 B2Hitachi Global Storage Technologies Netherlands B. V.
- Erasure techniques for magnetic tape media23 Nov 2004US 6,822,827 B1Imation Corp.
- Data storage drive with dedicated erase transducer24 Aug 2023US 2023/0267952 A1Seagate Technology LLC
- Magnetic head16 May 2019US 2019/0147906 A1Insurgo Media Services Ltd
- Data erasure apparatus, data erasure method and method for writing servo patterns on recording disk3 Nov 2005US 2005/0243461 A1Hitachi Global Storage Technologies Netherlands B. V.
Most cited
By later US patents
- Method for making permanent magnet type demagnetizing head60US 5,078,944 AMatsushita Electric Industrial Co., Ltd. · 1992
- Magnetic media erasure system36US 5,132,860 A1992
- Erasure techniques for magnetic tape media11US 6,822,827 B1Imation Corp. · 2004
- Method for manufacturing a multipolar erasing head10US 4,146,956 ATokyo Shibaura Electric Co., Ltd. · 1979
- Magnetic erasing head9US 4,613,919 AMatsushita Electric Industrial Co., Ltd. · 1986