H04N 21/42661
For reading from or writing on a magnetic storage medium
Official title: {for reading from or writing on a magnetic storage medium, e.g. hard disk drive}
H04N21/42661 (For reading from or writing on a magnetic storage medium) appears on 294 US grants and 495 published applications in this corpus.
Search patents in H04N- Granted patents
- 294
- Published applications
- 495
- Assignees
- 171
- Inventors
- 889
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 9 |
| 2002 | 6 | 32 |
| 2003 | 5 | 40 |
| 2004 | 9 | 49 |
| 2005 | 9 | 63 |
| 2006 | 15 | 47 |
| 2007 | 19 | 59 |
| 2008 | 17 | 41 |
| 2009 | 13 | 31 |
| 2010 | 28 | 22 |
| 2011 | 24 | 21 |
| 2012 | 32 | 8 |
| 2013 | 24 | 19 |
| 2014 | 21 | 10 |
| 2015 | 17 | 13 |
| 2016 | 14 | 9 |
| 2017 | 3 | 4 |
| 2018 | 6 | 2 |
| 2019 | 0 | 2 |
| 2020 | 4 | 7 |
| 2021 | 3 | 4 |
| 2022 | 3 | 2 |
| 2023 | 3 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Display device and controlling method of display device5 Aug 2025US 12,382,137 B2Samsung Electronics Co., Ltd.
- Storage drive protection using file system level encryption11 Jul 2023US 11,698,987 B2DISH Network Technologies India Private Limited
- Light weight transport stream streaming protocol for live transcoding system11 Jul 2023US 11,698,988 B2DISH Network Technologies India Private Limited
- Storage system and method for time-based data retrieval16 May 2023US 11,650,757 B2Western Digital Technologies, Inc.
- Recording control apparatus and control method thereof20 Sep 2022US 11,449,228 B2Canon Kabushiki Kaisha
- Display device and controlling method of display device2 Mar 2023US 2023/0060986 A1Samsung Electronics Co., Ltd.
- Information embedded method and system16 Jun 2022US 2022/0190944 A1Atlanta DTH, Inc.
- Storage System and Method for Time-Based Data Retrieval17 Mar 2022US 2022/0083268 A1Western Digital Technologies, Inc.
- Storage System and Method for High-Correlation Data Analysis with Unified Time Mapping9 Dec 2021US 2021/0385509 A1Western Digital Technologies, Inc.
- Method, device, and computer program product for storing and providing video2 Dec 2021US 2021/0375326 A1EMC IP Holding Company LLC
Most cited
By later US patents
- System and method for inserting local content into programming content941US 6,029,045 ACogent Technology, Inc. · 2000
- Audio setup and use instructions339US 5,903,266 AInternational Business Machines Corporation · 1999
- Method for selectively playing back programs recorded on a video tape191US 5,621,579 AIndex Systems, Inc. · 1997
- Audiovisual system which uses metadata to allow user-initiated jumps from point to point within multiple audiovisual streams175US 7,319,806 B1Keen Personal Media, Inc. · 2008
- Set-top box connectable to a digital video recorder via an auxiliary interface and selects between a recorded video signal received from the digital video recorder and a real-time video signal to provide video data stream to a display device171US 6,751,402 B1Keen Personal Media, Inc. · 2004