G11B 20/10175
Pr4, pr, i.e. partial response class 4, polynomial =
Official title: {PR4, PR(1,0,-1), i.e. partial response class 4, polynomial (1+D)(1-D)=(1-D2)}
G11B20/10175 (Pr4, pr, i.e. partial response class 4, polynomial =) appears on 71 US grants and 28 published applications in this corpus.
Search patents in G11B- Granted patents
- 71
- Published applications
- 28
- Assignees
- 27
- Inventors
- 83
- Latest grant
- 19 May 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 1 |
| 2003 | 2 | 2 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 3 | 6 |
| 2008 | 1 | 0 |
| 2009 | 4 | 3 |
| 2010 | 8 | 4 |
| 2011 | 4 | 3 |
| 2012 | 9 | 4 |
| 2013 | 10 | 0 |
| 2014 | 4 | 0 |
| 2015 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Viterbi decoder method and apparatus with RI detector in servo channel19 May 2015US 9,037,955 B1Marvell International Ltd.
- Rendering data write errors detectable31 Mar 2015US 8,996,967 B2STMicroelectronics S.r. l.
- Gain control with multiple integrators28 Oct 2014US 8,872,573 B2International Business Machines Corporation
- Detecting data-write errors3 Jun 2014US 8,745,466 B2STMicroelectronics S.r. l.
- Viterbi decoder method and apparatus with RI detector in servo channel22 Apr 2014US 8,707,147 B1Marvell International Ltd.
- Apparatus and Method to Read Information from an Information Storage Medium7 Jun 2012US 2012/0144228 A1International Business Machines Corporation
- Gain control with multiple integrators24 May 2012US 2012/0126876 A1International Business Machines Corporation
- Detecting data-write errors9 Feb 2012US 2012/0036395 A1STMicroelectronics S.r. l.
- Rendering data write errors detectable9 Feb 2012US 2012/0036414 A1STMicroelectronics S.r. l.
- Data-dependent noise-predictive maximum likelihood detection (dd-npml) for magnetic recording6 Oct 2011US 2011/0242692 A1International Business Machines Corporation
Most cited
By later US patents
- Disk drive comprising a dual read element and delay circuitry to improve read signal207US 8,139,301 B1Western Digital (Fremont), LLC · 2012
- Disk drive comprising a dual read element and delay circuitry to improve read signal156US 8,514,506 B1Western Digital (Fremont), LLC · 2013
- Disk drive adapting equalizer relative to bit error rate of sequence detector132US 7,944,639 B1Western Digital Technologies, Inc. · 2011
- Timing control for PRML class IV sampling data detection channel85US 5,258,933 AQuantum Corporation · 1993
- Method and apparatus for data detection for PRML data channels56US 5,949,831 AInternational Business Machines Corporation · 1999