G11B 15/44
Speed-changing arrangements
Official title: Speed-changing arrangements; Reversing arrangements; Drive transfer means therefor
G11B15/44 (Speed-changing arrangements) appears on 507 US grants and 43 published applications in this corpus.
Search patents in G11B- Granted patents
- 507
- Published applications
- 43
- Assignees
- 110
- Inventors
- 615
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 18 | 0 |
| 1978 | 18 | 0 |
| 1979 | 16 | 0 |
| 1980 | 14 | 0 |
| 1981 | 18 | 0 |
| 1982 | 18 | 0 |
| 1983 | 20 | 0 |
| 1984 | 24 | 0 |
| 1985 | 19 | 0 |
| 1986 | 23 | 0 |
| 1987 | 27 | 0 |
| 1988 | 19 | 0 |
| 1989 | 19 | 0 |
| 1990 | 19 | 0 |
| 1991 | 21 | 0 |
| 1992 | 5 | 0 |
| 1993 | 14 | 0 |
| 1994 | 24 | 0 |
| 1995 | 13 | 0 |
| 1996 | 20 | 0 |
| 1997 | 19 | 0 |
| 1998 | 16 | 0 |
| 1999 | 18 | 0 |
| 2000 | 10 | 0 |
| 2001 | 13 | 2 |
| 2002 | 3 | 3 |
| 2003 | 3 | 3 |
| 2004 | 3 | 7 |
| 2005 | 6 | 3 |
| 2006 | 3 | 3 |
| 2007 | 2 | 0 |
| 2008 | 4 | 3 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 4 | 4 |
| 2015 | 3 | 5 |
| 2016 | 3 | 2 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 2 | 0 |
| 2020 | 2 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 1 |
| 2023 | 0 | 1 |
| 2024 | 2 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Enhanced dynamic braking algorithm for tape storage device15 Sep 2026US 12,738,297 B2International Business Machines Corporation
- Power improvement for minimum switching frequency operation19 Nov 2024US 12,148,446 B1Western Digital Technologies, Inc.
- Regenerative braking for tape drive7 May 2024US 11,978,479 B2Western Digital Technologies, Inc.
- Information processing apparatus and information processing method27 Dec 2022US 11,538,497 B2Fujitsu Limited
- Magnetic tape device, magnetic recording device, and tape lifting method for magnetic tape device19 Jul 2022US 11,393,504 B2NEC Platforms, Ltd.
- Enhanced dynamic braking algorithm for tape storage device16 Jan 2025US 2025/0022484 A1International Business Machines Corporation
- Regenerative Braking For Tape Drive21 Dec 2023US 2023/0410844 A1Western Digital Technologies, Inc.
- Information processing apparatus and information processing method12 May 2022US 2022/0148620 A1Fujitsu Limited
- Magnetic tape device, magnetic recording device, and tape lifting method for magnetic tape device25 Nov 2021US 2021/0366516 A1NEC Platforms, Ltd.
- Adjustable magnetic tape drive26 Mar 2020US 2020/0098389 A1International Business Machines Corporation
Most cited
By later US patents
- Signal reproduction apparatus including touched state pattern recognition speed control82US 4,719,524 ASony Corporation · 1988
- Mode selecting device for a video signal reproducing apparatus31US 4,428,005 ASony Corporation · 1984
- Cartridge tape recorder system and cartridge therefor30US 4,093,149 AHoneywell Inc. · 1978
- Method and apparatus for generating, storing, reproducing, and displaying image information30US 5,177,645 A1993
- Tape stop detecting mechanism24US 4,238,808 ATokyo Shibaura Denki Kabushiki Kaisha · 1980