G11B 23/281
By changing the physical properties of the record carrier
Official title: {by changing the physical properties of the record carrier}
G11B23/281 (By changing the physical properties of the record carrier) appears on 265 US grants and 248 published applications in this corpus.
Search patents in G11B- Granted patents
- 265
- Published applications
- 248
- Assignees
- 105
- Inventors
- 404
- Latest grant
- 2 Mar 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 10 | 0 |
| 1998 | 15 | 0 |
| 1999 | 7 | 0 |
| 2000 | 15 | 0 |
| 2001 | 16 | 5 |
| 2002 | 12 | 32 |
| 2003 | 21 | 24 |
| 2004 | 15 | 28 |
| 2005 | 15 | 25 |
| 2006 | 12 | 33 |
| 2007 | 16 | 37 |
| 2008 | 11 | 30 |
| 2009 | 19 | 14 |
| 2010 | 18 | 7 |
| 2011 | 16 | 6 |
| 2012 | 9 | 1 |
| 2013 | 7 | 3 |
| 2014 | 3 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 0 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Hard disk drive scrapper2 Mar 2021US 10,933,504 B2Dell Products L. P.
- Transient devices designed to undergo programmable transformations27 Aug 2019US 10,396,173 B2The Board of Trustees of the University of Illinois
- Optical medium reproducing apparatus, optical medium reproducing method, and optical medium3 Jul 2018US 10,014,023 B2Sony Corporation
- Transient devices designed to undergo programmable transformations27 Jun 2017US 9,691,873 B2The Board of Trustees of the University of Illinois
- Method and system for activation of an optical article6 Dec 2016US 9,514,782 B2NBCUniversal Media, LLC
- Hard disk drive scrapper31 Oct 2019US 2019/0329373 A1Dell Products L. P.
- Transient Devices Designed to Undergo Programmable Transformations21 Jun 2018US 2018/0175158 A1The Board of Trustees of the University of Illinois
- Optical medium reproducing apparatus, optical medium reproducing method, and optical medium21 Sep 2017US 2017/0270957 A1Sony Corporation
- Copy protection method for optical storage device19 Dec 2013US 2013/0336102 A1
- Non-authentic disc deactivation method21 Nov 2013US 2013/0312121 A1
Most cited
By later US patents
- Method and apparatus for improved fingerprinting and authenticating various magnetic media361US 5,740,244 AWashington University · 1998
- Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk167US 5,761,301 AMatsushita Electric Industrial Co., Ltd. · 1998
- Optical disk, optical disk recording and reproducing apparatus, method for recording, reproducing and deleting data on optical disk, and information processing system144US 6,938,162 B1Matsushita Electric Industrial Co., Ltd. · 2005
- CD-ROM with machine-readable i.d. code117US 5,513,169 ADigital Audio Disc Corporation · 1996
- CD-ROM with machine-readable I.D. code114US 5,400,319 ADigital Audio Disc Corporation · 1995