G11B 2220/218
Write-once discs
G11B2220/218 (Write-once discs) appears on 1,749 US grants and 1,755 published applications in this corpus.
Search patents in G11B- Granted patents
- 1,749
- Published applications
- 1,755
- Assignees
- 253
- Inventors
- 1,946
- Latest grant
- 30 Mar 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 8 | 0 |
| 1989 | 9 | 0 |
| 1990 | 7 | 0 |
| 1991 | 10 | 0 |
| 1992 | 11 | 0 |
| 1993 | 13 | 0 |
| 1994 | 24 | 0 |
| 1995 | 27 | 0 |
| 1996 | 15 | 0 |
| 1997 | 26 | 0 |
| 1998 | 33 | 0 |
| 1999 | 36 | 0 |
| 2000 | 41 | 0 |
| 2001 | 47 | 67 |
| 2002 | 71 | 217 |
| 2003 | 106 | 165 |
| 2004 | 104 | 258 |
| 2005 | 85 | 234 |
| 2006 | 157 | 205 |
| 2007 | 175 | 189 |
| 2008 | 180 | 195 |
| 2009 | 130 | 90 |
| 2010 | 136 | 52 |
| 2011 | 112 | 27 |
| 2012 | 81 | 24 |
| 2013 | 54 | 9 |
| 2014 | 21 | 9 |
| 2015 | 8 | 6 |
| 2016 | 6 | 3 |
| 2017 | 3 | 2 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Imaging device and recording control system30 Mar 2021US 10,965,901 B2Sony Corporation
- Information recording device and data erasing method5 May 2020US 10,643,650 B2Panasonic Intellectual Property Management Co., Ltd.
- Writing method of data, reading method of data, and optical disc drive6 Nov 2018US 10,121,507 B2Panasonic Intellectual Property Management Co., Ltd.
- Optical information medium having multiple layers with management information areas disposed at the same distance from center17 Oct 2017US 9,792,942 B2Panasonic Intellectual Property Management Co., Ltd.
- Method of storing a real time stream of information signals on a disc like record carrier18 Jul 2017US 9,711,184 B2Koninklijke Philips N. V.
- Data recording device and data recording method31 Aug 2023US 2023/0274765 A1
- Information recording device and data erasing method12 Sep 2019US 2019/0279676 A1Panasonic Intellectual Property Management Co., Ltd.
- Metadata processing for an optical medium1 Nov 2018US 2018/0315451 A1International Business Machines Corporation
- Writing method of data, reading method of data, and optical disc drive27 Apr 2017US 2017/0117012 A1Panasonic Intellectual Property Management Co., Ltd.
- Imaging device and recording control system23 Mar 2017US 2017/0085830 A1Sony Corporation
Most cited
By later US patents
- Video communications system having a remotely controlled central source of video and audio data1,037US 4,949,187 A1990
- Steganographic techniques for securely delivering electronic digital rights management control information over insecure communication channels1,021US 5,943,422 AIntertrust Technologies Corporation · 1999
- Apparatus and method for an on demand data delivery system for the preview, selection, retrieval and reproduction at a remote location of previously recorded or programmed materials789US 5,418,713 A1995
- Trusted infrastructure support system, methods and techniques for secure electronic commerce transaction and rights management720US 6,658,568 B1Intertrust Technologies Corporation · 2003
- Digital information accessing, delivery and production system623US 5,734,719 AInternational Business Systems, Incorporated · 1998