H04L 63/0227
Filtering policies
Official title: {Filtering policies (mail message filtering H04L51/212)}
H04L63/0227 (Filtering policies) appears on 11,107 US grants and 12,170 published applications in this corpus.
Search patents in H04L- Granted patents
- 11,107
- Published applications
- 12,170
- Assignees
- 2,519
- Inventors
- 18,696
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 21 | 0 |
| 1999 | 29 | 0 |
| 2000 | 36 | 0 |
| 2001 | 49 | 20 |
| 2002 | 41 | 164 |
| 2003 | 54 | 196 |
| 2004 | 65 | 219 |
| 2005 | 70 | 277 |
| 2006 | 131 | 310 |
| 2007 | 111 | 285 |
| 2008 | 139 | 281 |
| 2009 | 184 | 235 |
| 2010 | 255 | 290 |
| 2011 | 284 | 252 |
| 2012 | 334 | 325 |
| 2013 | 372 | 396 |
| 2014 | 481 | 482 |
| 2015 | 547 | 529 |
| 2016 | 572 | 671 |
| 2017 | 588 | 683 |
| 2018 | 614 | 700 |
| 2019 | 677 | 798 |
| 2020 | 850 | 928 |
| 2021 | 852 | 893 |
| 2022 | 868 | 828 |
| 2023 | 886 | 781 |
| 2024 | 852 | 674 |
| 2025 | 712 | 619 |
| 2026 | 420 | 334 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of edge-based auto containment6 Oct 2026US 12,756,686 B2Bull SAS
- Zero trust network infrastructure with location service for routing connections via intermediary nodes6 Oct 2026US 12,756,687 B2Akami Technologies, Inc.
- Wireless flow inspection solution in SD-WAN multi-domains6 Oct 2026US 12,756,688 B2Cisco Technology, Inc.
- Detecting and preventing transmission of spam messages using modified source numbers6 Oct 2026US 12,756,689 B2Proofpoint, Inc.
- Network security using primary and secondary security group tags6 Oct 2026US 12,756,716 B2Cisco Technology, Inc.
- System to manage privacy preferences8 Oct 2026US 2026/0312933 A1Wells Fargo Bank, N. A.
- Inline multi-stage attack detection and prevention8 Oct 2026US 2026/0312934 A1Palo Alto Networks, Inc.
- Method for cooperatively filtering data traffic in a communication network8 Oct 2026US 2026/0312935 A1
- User datagram protocol firewall8 Oct 2026US 2026/0312936 A1Microsoft Technology Licensing, LLC
- Secure data routing and randomization8 Oct 2026US 2026/0312937 A1Scatr Corp
Most cited
By later US patents
- Data security system and method responsive to electronic attacks1,449US 7,146,644 B2Digital Doors, Inc. · 2006
- System and methodology for managing internet access on a per application basis for client computers connected to the internet1,331US 5,987,611 AZone Labs, Inc. · 1999
- Networked personal contact manager1,124US 6,269,369 B1Amazon.Com Holdings, Inc. · 2001
- Electronic document delivery system in which notification of said electronic document is sent to a recipient thereof1,055US 5,790,790 ATumbleweed Software Corporation · 1998
- Digital information infrastructure and method for security designated data and with granular data stores1,001US 8,468,244 B2Digital Doors, Inc. · 2013