G11B 15/28
Through rollers driving by frictional contact with the record carrier
Official title: through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
G11B15/28 (Through rollers driving by frictional contact with the record carrier) appears on 397 US grants and 31 published applications in this corpus.
Search patents in G11B- Granted patents
- 397
- Published applications
- 31
- Assignees
- 139
- Inventors
- 567
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 21 | 0 |
| 1978 | 21 | 0 |
| 1979 | 15 | 0 |
| 1980 | 17 | 0 |
| 1981 | 17 | 0 |
| 1982 | 21 | 0 |
| 1983 | 19 | 0 |
| 1984 | 17 | 0 |
| 1985 | 9 | 0 |
| 1986 | 11 | 0 |
| 1987 | 14 | 0 |
| 1988 | 16 | 0 |
| 1989 | 18 | 0 |
| 1990 | 4 | 0 |
| 1991 | 19 | 0 |
| 1992 | 9 | 0 |
| 1993 | 7 | 0 |
| 1994 | 16 | 0 |
| 1995 | 10 | 0 |
| 1996 | 8 | 0 |
| 1997 | 11 | 0 |
| 1998 | 12 | 0 |
| 1999 | 11 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 0 |
| 2002 | 10 | 7 |
| 2003 | 2 | 6 |
| 2004 | 5 | 5 |
| 2005 | 3 | 0 |
| 2006 | 0 | 7 |
| 2007 | 8 | 1 |
| 2008 | 2 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Magnetic tape device and method of operating magnetic tape device29 Jul 2025US 12,374,363 B2FUJIFILM Corporation
- Tape drive with a tape roller assembly that includes a roller member and a stop mechanism30 Jan 2024US 11,887,625 B1MagStor Inc.
- Head positioning assembly for tape embedded drive5 Apr 2022US 11,295,771 B2Western Digital Technologies, Inc.
- Tape embedded drive with tied spindle structure4 May 2021US 10,997,998 B1Western Digital Technologies, Inc.
- Dynamic tape guide bearing tilt mechanism1 Dec 2020US 10,854,236 B1International Business Machines Corporation
- Magnetic tape device and method of operating magnetic tape device18 May 2023US 2023/0154493 A1FUJIEILM Corporation
- Head Positioning Assembly For Tape Embedded Drive23 Dec 2021US 2021/0398558 A1Western Digital Technologies, Inc.
- Grooved tape guide roller8 Jan 2015US 2015/0009792 A1Oracle International Corporation
- Method for counteracting longitudinal oscillations of magnetic tape in a tape drive system1 Oct 2009US 2009/0244773 A1Sun Microsystems, Inc.
- Tape recording system with coupled paired roller guides17 Apr 2008US 2008/0088967 A1International Business Machines Corporation
Most cited
By later US patents
- Recorder for cardiac signals with manually actuated event marking213US 4,123,785 ADel Mar Avionics · 1978
- Retrace data elimination103US 4,048,617 ARecognition Equipment Incorporated · 1977
- Error prevention in a recording and reproducing device with at least one rotating head60US 5,067,035 AKudelski SA fabrique de'enregistreurs Nagra · 1991
- Method and apparatus for uninterrupted recording and reproduction in a multichannel mode of information on tape56US 3,942,190 AMatsushita Electric Industrial Co., Ltd. · 1976
- Hand operated optical character recognition wand51US 3,947,817 ARecognition Equipment Incorporated · 1976