G11B 2220/235
Multilayer discs, i.e. multiple recording layers accessed from the same side
G11B2220/235 (Multilayer discs, i.e. multiple recording layers accessed from the same side) appears on 609 US grants and 765 published applications in this corpus.
Search patents in G11B- Granted patents
- 609
- Published applications
- 765
- Assignees
- 98
- Inventors
- 620
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 9 | 0 |
| 1999 | 11 | 0 |
| 2000 | 7 | 0 |
| 2001 | 14 | 12 |
| 2002 | 15 | 38 |
| 2003 | 26 | 22 |
| 2004 | 16 | 48 |
| 2005 | 16 | 62 |
| 2006 | 36 | 100 |
| 2007 | 47 | 128 |
| 2008 | 87 | 159 |
| 2009 | 61 | 67 |
| 2010 | 66 | 48 |
| 2011 | 68 | 34 |
| 2012 | 53 | 19 |
| 2013 | 37 | 11 |
| 2014 | 14 | 7 |
| 2015 | 7 | 4 |
| 2016 | 5 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 2 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Handling write commands during a refresh operation in a shingled magnetic recording drive26 May 2026US 12,640,165 B2Kabushiki Kaisha Toshiba
- Magnetic recording medium and magnetic recording device4 Nov 2025US 12,462,838 B2Kabushiki Kaisha Toshiba
- Magnetic recording media with dead magnetic layer31 Dec 2024US 12,183,377 B2Western Digital Technologies, Inc.
- Writing method of data, reading method of data, and optical disc drive6 Nov 2018US 10,121,507 B2Panasonic Intellectual Property Management Co., Ltd.
- Magnetic recording and reproducing device and magnetic recording and reproducing method20 Mar 2018US 9,922,674 B2Kabushiki Kaisha Toshiba
- Handling write commands during a refresh operation in a shingled magnetic recording drive15 Jan 2026US 2026/0018186 A1Kabushiki Kaisha Toshiba
- Magnetic recording media with dead magnetic layer5 Dec 2024US 2024/0404554 A1Western Digital Technologies, Inc.
- Magnetic recording medium and magnetic recording device10 Oct 2024US 2024/0339128 A1Kabushiki Kaisha Toshiba
- Writing method of data, reading method of data, and optical disc drive27 Apr 2017US 2017/0117012 A1Panasonic Intellectual Property Management Co., Ltd.
- Information recording medium, information recording method, information recording device, information playback method, and information playback device24 Nov 2016US 2016/0343394 A1Panasonic Intellectual Property Management Co., Ltd.
Most cited
By later US patents
- Integration of music from a personal library with real-time information1,026US 6,192,340 B12001
- Method and an apparatus for encoding a bitstream with plural possible searching reproduction paths information253US 5,854,873 AMatsushita Electric Industrial Co., Ltd. · 1998
- Method and an apparatus for interleaving bitstream to record thereof on a recording medium, and reproducing the interleaved bitstream therefrom223US 5,784,528 AMatsushita Electric Industrial Co., Ltd. · 1998
- Information recording disk with management areas182US 5,878,020 AKabushiki Kaisha Toshiba · 1999
- Method and an optical disc for generating a bitstream containing a plurality of video objects including video and audio data176US 5,884,004 AMatsushita Electric Industrial Co., Ltd. · 1999