H04N 1/3216
Using fourier transforms
Official title: {using Fourier transforms}
H04N1/3216 (Using fourier transforms) appears on 243 US grants and 215 published applications in this corpus.
Search patents in H04N- Granted patents
- 243
- Published applications
- 215
- Assignees
- 45
- Inventors
- 149
- Latest grant
- 12 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 10 |
| 2002 | 9 | 25 |
| 2003 | 19 | 25 |
| 2004 | 18 | 16 |
| 2005 | 8 | 15 |
| 2006 | 20 | 15 |
| 2007 | 10 | 12 |
| 2008 | 24 | 20 |
| 2009 | 15 | 16 |
| 2010 | 19 | 20 |
| 2011 | 27 | 16 |
| 2012 | 18 | 2 |
| 2013 | 10 | 3 |
| 2014 | 4 | 4 |
| 2015 | 4 | 2 |
| 2016 | 2 | 2 |
| 2017 | 2 | 2 |
| 2018 | 0 | 1 |
| 2019 | 4 | 1 |
| 2020 | 3 | 5 |
| 2021 | 3 | 0 |
| 2022 | 2 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- System and method for automatic identification of photocopied documents12 Mar 2024US 11,930,147 B2Sotec Consulting Sl
- Methods and arrangements for enhancing detection of digital watermark signals21 Jun 2022US 11,367,159 B1Digimarc Corporation
- Systems and methods for embedding data in remote session displays8 Mar 2022US 11,270,007 B2Citrix Systems, Inc.
- Method of embedding and extracting watermark data using a correction image comparison with a noise-based image in the frequency domain28 Sep 2021US 11,134,167 B2Beyontech, Inc
- Method of extracting watermark data in an image with reference to a noise-based image located in the image based on a comparison process performed in the frequency domain20 Jul 2021US 11,070,700 B2Beyontech, Inc
- Device and method for generating watermarked media17 Jul 2025US 2025/0232396 A1Ictk Co., Ltd.
- System for data seclusion in image and audio files6 Oct 2022US 2022/0321737 A1
- System and method for automatic identification of photocopied documents3 Feb 2022US 2022/0038599 A1Sotec Consulting Sl
- Method of Embedding and Extracting Watermark Data31 Dec 2020US 2020/0412905 A1Beyontech, Inc
- Method of Embedding and Extracting Watermark Data31 Dec 2020US 2020/0412906 A1Beyontech, Inc
Most cited
By later US patents
- Methods for surveying dissemination of proprietary empirical data1,132US 5,862,260 ADigimarc Corporation · 1999
- Computer system linked by using information in data objects1,131US 6,122,403 ADigimarc Corporation · 2000
- Linking of computers based on optical sensing of digital data942US 6,311,214 B1Digimarc Corporation · 2001
- Watermark embedder and reader942US 6,614,914 B1Digimarc Corporation · 2003
- Connected audio and other media objects859US 6,505,160 B1Digimarc Corporation · 2003