H04N 1/4446
Hiding of documents or document information
Official title: {Hiding of documents or document information}
H04N1/4446 (Hiding of documents or document information) appears on 161 US grants and 176 published applications in this corpus.
Search patents in H04N- Granted patents
- 161
- Published applications
- 176
- Assignees
- 66
- Inventors
- 319
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 9 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 7 |
| 2005 | 1 | 2 |
| 2006 | 3 | 2 |
| 2007 | 2 | 11 |
| 2008 | 2 | 8 |
| 2009 | 5 | 9 |
| 2010 | 4 | 4 |
| 2011 | 6 | 2 |
| 2012 | 7 | 4 |
| 2013 | 2 | 5 |
| 2014 | 8 | 4 |
| 2015 | 6 | 11 |
| 2016 | 7 | 11 |
| 2017 | 2 | 3 |
| 2018 | 4 | 12 |
| 2019 | 10 | 8 |
| 2020 | 10 | 18 |
| 2021 | 14 | 11 |
| 2022 | 7 | 8 |
| 2023 | 6 | 14 |
| 2024 | 6 | 9 |
| 2025 | 10 | 4 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Image forming apparatus14 Jul 2026US 12,684,080 B2KYOCERA Document Solutions Inc.
- Image capturing apparatus, image capturing system, and control method23 Jun 2026US 12,665,975 B2Canon Kabushiki Kaisha
- Information processing apparatus, control method for information processing apparatus, and storage medium16 Jun 2026US 12,659,417 B2Canon Kabushiki Kaisha
- Self-verifying hidden digital media within other digital media5 May 2026US 12,621,400 B2
- Information processing apparatus, non-transitory computer readable medium storing program, and information processing method13 Jan 2026US 12,526,377 B2FUJIFILM Corporation
- Self-Verifying Hidden Digital Media Within Other Digital Media10 Sep 2026US 2026/0270361 A1
- Image reading apparatus18 Jun 2026US 2026/0172513 A1Seiko Epson Corporation
- Systems and methods for creating enhanced documents for perfect automated parsing26 Mar 2026US 2026/0087062 A1Bold Limited
- Systems and methods for creating enhanced documents for perfect automated parsing19 Mar 2026US 2026/0080001 A1Bold Limited
- Systems and methods for creating enhanced documents for perfect automated parsing19 Mar 2026US 2026/0080002 A1Bold Limited
Most cited
By later US patents
- Method and apparatus for delivering secured hard-copy facsimile documents119US 5,255,106 AInternational Integrated Communications, Ltd. · 1993
- Selective encryption of mixed raster content layers88US 6,954,532 B1Xerox Corporation · 2005
- Security system method and article for photocopiers and telefax machines73US 5,184,849 A1993
- Facsimile output job sorting unit and system49US 5,513,013 AXerox Corporation · 1996
- Automatic facsimile output recipient telephoning system41US 5,295,181 AXerox Corporation · 1994