G11B 20/00818
Wherein the usage restriction limits the signal quality
Official title: {wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals}
G11B20/00818 (Wherein the usage restriction limits the signal quality) appears on 126 US grants and 153 published applications in this corpus.
Search patents in G11B- Granted patents
- 126
- Published applications
- 153
- Assignees
- 72
- Inventors
- 218
- Latest grant
- 16 Aug 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 6 |
| 2003 | 4 | 20 |
| 2004 | 5 | 8 |
| 2005 | 4 | 16 |
| 2006 | 5 | 16 |
| 2007 | 4 | 16 |
| 2008 | 9 | 23 |
| 2009 | 4 | 7 |
| 2010 | 14 | 4 |
| 2011 | 21 | 11 |
| 2012 | 12 | 6 |
| 2013 | 3 | 4 |
| 2014 | 11 | 3 |
| 2015 | 6 | 2 |
| 2016 | 2 | 3 |
| 2017 | 2 | 3 |
| 2018 | 3 | 1 |
| 2019 | 2 | 3 |
| 2020 | 2 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Enhanced security preview of digital content16 Aug 2022US 11,418,356 B2Nytell Software LLC
- Method and system for controlling media conveyance by a device to a user based on current location of the device5 Apr 2022US 11,294,988 B2Bce Inc.
- System and methods for permitting open access to data objects and for securing data within the data objects5 May 2020US 10,644,884 B2Wistaria Trading, Inc.
- Enhanced security preview of digital content4 Feb 2020US 10,554,424 B2Nytell Software LLC
- Playback method and playback device22 Oct 2019US 10,455,189 B2Panasonic Intellectual Property Management Co., Ltd.
- Enhanced Security Preview of Digital Content13 Aug 2020US 2020/0259670 A1Nytell Software LLC
- Playback method and playback device25 Jul 2019US 2019/0230316 A1Panasonic Intellectual Property Management Co., Ltd.
- Method and apparatus for tracking pirated media14 Feb 2019US 2019/0051328 A1
- System and methods for permitting open access to data objects and for securing data within the data objects24 Jan 2019US 2019/0028272 A1Wistaria Trading, Inc.
- Playback method and playback device17 May 2018US 2018/0139406 A1Panasonic Intellectual Property Management Co., Ltd.
Most cited
By later US patents
- Multi-media copy management system382US 5,963,909 ASolana Technology Development Corporation · 1999
- Multi-media copy management system333US 5,719,937 ASolana Technology Develpment Corporation · 1998
- Reprogrammable security for controlling piracy and enabling interactive content298US 8,571,993 B2Irdeto USA, Inc. · 2013
- Self-protecting digital content262US 7,984,511 B2Rovi Solutions Corporation · 2011
- Self-protecting digital content240US 7,987,510 B2Rovi Solutions Corporation · 2011