G11B 15/12
Masking of heads
Official title: Masking of heads; {circuits for} Selecting or switching of heads between operative and inoperative functions {or between different operative functions or for selection between operative heads}; Masking of beams, e.g. of light beams {(track selection by moving the magnetic head G11B5/54)}
G11B15/12 (Masking of heads) appears on 636 US grants and 65 published applications in this corpus.
Search patents in G11B- Granted patents
- 636
- Published applications
- 65
- Assignees
- 126
- Inventors
- 877
- Latest grant
- 22 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 13 | 0 |
| 1982 | 13 | 0 |
| 1983 | 11 | 0 |
| 1984 | 11 | 0 |
| 1985 | 7 | 0 |
| 1986 | 13 | 0 |
| 1987 | 19 | 0 |
| 1988 | 9 | 0 |
| 1989 | 17 | 0 |
| 1990 | 11 | 0 |
| 1991 | 22 | 0 |
| 1992 | 21 | 0 |
| 1993 | 18 | 0 |
| 1994 | 39 | 0 |
| 1995 | 29 | 0 |
| 1996 | 32 | 0 |
| 1997 | 35 | 0 |
| 1998 | 55 | 0 |
| 1999 | 40 | 0 |
| 2000 | 59 | 0 |
| 2001 | 34 | 14 |
| 2002 | 30 | 8 |
| 2003 | 13 | 9 |
| 2004 | 12 | 10 |
| 2005 | 8 | 13 |
| 2006 | 15 | 4 |
| 2007 | 7 | 1 |
| 2008 | 7 | 3 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Magnetic disk device and method of changing recording mode22 Aug 2023US 11,735,221 B2Kabushiki Kaisha Toshiba
- Magnetic recording and reproducing device having magnetic head with first and second reproducing element portions and magnetic reproducing method21 Nov 2017US 9,824,703 B2Kabushiki Kaisha Toshiba
- Magnetic read head with multiple read transducers each having different design characteristics26 Jul 2016US 9,401,161 B1Seagate Technology LLC
- Magnetic tape driving apparatus comprising a tape separation portion that separates a magnetic tape from a magnetoresistive head unit17 Apr 2012US 8,159,776 B2Hitachi Maxell, Ltd.
- Methods and apparatus for decoding and displaying different resolution video signals28 Feb 2012US 8,126,050 B2Hitachi America, Ltd.
- Magnetic disk device and method of changing recording mode6 Apr 2023US 2023/0109214 A1Kabushiki Kaisha Toshiba
- Magnetic recording and reproducing device and magnetic reproducing method24 Aug 2017US 2017/0243604 A1Kabushiki Kaisha Toshiba
- Methods and apparatus for decoding and displaying different resolution video signals5 Nov 2009US 2009/0274217 A1Hitachi America, Ltd.
- Magnetic tape driving apparatus23 Oct 2008US 2008/0259490 A1Hitachi Maxell, Ltd.
- Magnetic recording and playback method and magnetic recording and playback apparatus1 May 2008US 2008/0100947 A1
Most cited
By later US patents
- Digital video recorder compatible receiver with trick play image enhancement527US 5,377,051 AHitachi America, Ltd. · 1994
- Electronic device using magnetic components385US 5,695,864 AInternational Business Machines Corporation · 1997
- Video recording device compatible transmitter182US 5,805,762 AHitachi America, Ltd. · 1998
- Digital video decoder for decoding digital high definition and/or digital standard definition television signals177US 5,614,952 AHitachi America, Ltd. · 1997
- Low cost joint HD/SD television decoder methods and apparatus159US 5,635,985 AHitachi America, Ltd. · 1997