H04L 9/3247
Involving digital signatures
Official title: {involving digital signatures}
H04L9/3247 (Involving digital signatures) appears on 14,214 US grants and 17,235 published applications in this corpus.
Search patents in H04L- Granted patents
- 14,214
- Published applications
- 17,235
- Assignees
- 3,744
- Inventors
- 22,602
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 10 | 0 |
| 1991 | 14 | 0 |
| 1992 | 6 | 0 |
| 1993 | 14 | 0 |
| 1994 | 15 | 0 |
| 1995 | 18 | 0 |
| 1996 | 22 | 0 |
| 1997 | 36 | 0 |
| 1998 | 33 | 0 |
| 1999 | 57 | 0 |
| 2000 | 61 | 0 |
| 2001 | 50 | 32 |
| 2002 | 48 | 143 |
| 2003 | 34 | 146 |
| 2004 | 38 | 137 |
| 2005 | 64 | 237 |
| 2006 | 143 | 233 |
| 2007 | 121 | 259 |
| 2008 | 131 | 324 |
| 2009 | 153 | 295 |
| 2010 | 233 | 304 |
| 2011 | 243 | 238 |
| 2012 | 274 | 262 |
| 2013 | 323 | 367 |
| 2014 | 411 | 355 |
| 2015 | 382 | 406 |
| 2016 | 396 | 496 |
| 2017 | 460 | 693 |
| 2018 | 522 | 903 |
| 2019 | 786 | 1245 |
| 2020 | 1062 | 1733 |
| 2021 | 1339 | 1686 |
| 2022 | 1534 | 1573 |
| 2023 | 1387 | 1509 |
| 2024 | 1537 | 1460 |
| 2025 | 1417 | 1217 |
| 2026 | 822 | 982 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Systems and methods for region-specific sub-tokenization in cryptographic transaction processing6 Oct 2026US 12,754,690 B2Vannadium, Inc.
- Methods to ensure trust validation and integrity of workflow execution6 Oct 2026US 12,755,019 B2Dell Products L. P.
- Blockchain-based anonymous trusted voting method, apparatus and related device6 Oct 2026US 12,755,028 B2Guizhou Power Grid Company Limited
- Secure digital data collection6 Oct 2026US 12,755,057 B2Imagekeeper LLC
- Timestamp generation method and apparatus, and electronic device and storage medium6 Oct 2026US 12,756,550 B2Electric Power Research Institute, China Southern Powerr Grid
- Centralized authorization for secure shell access8 Oct 2026US 2026/0312792 A1CyberArk Software Ltd.
- Method, device and computer program for carrying out an electronic draw8 Oct 2026US 2026/0312799 A1La Francaise Des Jeux
- Methods and systems for generating, subscribing to and processing action plans using a blockchain8 Oct 2026US 2026/0312803 A1
- Autonomous computing system for digital asset redemption state control and synchronization of distributed ledger records8 Oct 2026US 2026/0312810 A1
- Systems and Methods for Creating a Verified Web Using Blockchain Domains, AI Agents and Verified Resolutions Using Metadata and Proofs8 Oct 2026US 2026/0312813 A1
Most cited
By later US patents
- Method and apparatus for the secure distributed storage and retrieval of information1,561US 5,991,414 AInternational Business Machines Corporation · 1999
- Method and apparatus for the secure distributed storage and retrieval of information1,551US 6,192,472 B1International Business Machines Corporation · 2001
- Electronic funds transfer instruments1,431US 5,677,955 ABell Communications Research, Inc. · 1997
- System and method for secure three-party communications1,364US 8,316,237 B12012
- Data storage system and method by shredding and deshredding1,338US 7,636,724 B2Peerify Technologies, LLC · 2009