G11B 20/1492
Two levels are symmetric, in respect of the sign to the third
Official title: {two levels are symmetric, in respect of the sign to the third level which is "zero"}
G11B20/1492 (Two levels are symmetric, in respect of the sign to the third) appears on 31 US grants and 6 published applications in this corpus.
Search patents in G11B- Granted patents
- 31
- Published applications
- 6
- Assignees
- 20
- Inventors
- 39
- Latest grant
- 22 Aug 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 2 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Magnetic disk device and method of generating write data22 Aug 2023US 11,735,209 B2Kabushiki Kaisha Toshiba
- Adaptive correction of symmetrical and asymmetrical saturation in magnetic recording devices5 Apr 2016US 9,305,591 B2Quantum Corporation
- Adaptive correction of symmetrical and asymmetrical saturation in magnetic recording devices24 Jun 2014US 8,760,789 B2Quantum Corporation
- Detecting a periodic sequence of servo signals20 Mar 2012US 8,139,302 B2International Business Machines Corporation
- Biphase multiple level communications22 Mar 2011US 7,912,143 B1And Yet, Inc.
- Magnetic disk device and method of generating write data16 Mar 2023US 2023/0081206 A1Kabushiki Kaisha Toshiba
- Adaptive correction of symmetrical and asymmetrical saturation in magnetic recording devices9 Oct 2014US 2014/0300986 A1Quantum Corporation
- Adaptive Correction of Symmetrical and Asymmetrical Saturation in Magnetic Recording Devices28 Mar 2013US 2013/0077187 A1Quantum Corporation
- Detecting a periodic sequence of servo signals2 Dec 2010US 2010/0302666 A1International Business Machines Corporation
- Apparatus, system, and method for detecting a periodic sequence of servo signals6 Mar 2008US 2008/0055759 A1International Business Machines Corporation
Most cited
By later US patents
- Digital coding technique which avoids loss of synchronization67US 5,461,379 AAT&T IPM Corp. · 1995
- Automatic threshold tracking system53US 4,399,474 AAmpex Corporation · 1983
- Direction-constrained ternary codes using peak and polarity detection50US 4,566,044 AInternational Business Machines Corporation · 1986
- Data processing apparatus and methods including a phase lock loop46US 5,896,067 AHewlett-Packard Company · 1999
- System for transmission storage and/or multiplexing of information31US 4,103,234 AGeneral Dynamics Corporation · 1978