H04L 51/212
Using filtering or selective blocking
Official title: using filtering or selective blocking
H04L51/212 (Using filtering or selective blocking) appears on 5,049 US grants and 5,810 published applications in this corpus.
Search patents in H04L- Granted patents
- 5,049
- Published applications
- 5,810
- Assignees
- 1,412
- Inventors
- 8,879
- 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 | 3 | 0 |
| 1997 | 8 | 0 |
| 1998 | 10 | 0 |
| 1999 | 11 | 0 |
| 2000 | 18 | 0 |
| 2001 | 19 | 8 |
| 2002 | 23 | 74 |
| 2003 | 23 | 92 |
| 2004 | 41 | 155 |
| 2005 | 29 | 237 |
| 2006 | 62 | 259 |
| 2007 | 72 | 207 |
| 2008 | 84 | 242 |
| 2009 | 148 | 234 |
| 2010 | 198 | 204 |
| 2011 | 217 | 169 |
| 2012 | 228 | 203 |
| 2013 | 248 | 227 |
| 2014 | 271 | 220 |
| 2015 | 269 | 324 |
| 2016 | 294 | 366 |
| 2017 | 277 | 308 |
| 2018 | 283 | 292 |
| 2019 | 346 | 357 |
| 2020 | 372 | 306 |
| 2021 | 343 | 277 |
| 2022 | 310 | 277 |
| 2023 | 276 | 247 |
| 2024 | 277 | 237 |
| 2025 | 190 | 172 |
| 2026 | 96 | 116 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for AI based normalization and indexing of multi-protocol message content using universal message objects6 Oct 2026US 12,754,918 B2Entefy Inc.
- Detecting and preventing transmission of spam messages using modified source numbers6 Oct 2026US 12,756,689 B2Proofpoint, Inc.
- Dynamically controlling access to linked content in electronic communications29 Sep 2026US 12,748,869 B2Proofpoint, Inc.
- Dynamically controlling access to linked content in electronic communications29 Sep 2026US 12,748,870 B2Proofpoint, Inc.
- Sharing structured views of email messages between users29 Sep 2026US 12,750,333 B2Notion Labs, Inc.
- Validating predicate-based filters used in asynchronous messaging systems1 Oct 2026US 2026/0303556 A1Indian Institute of Technology Roorkee
- Intelligent filtering of flagged electronic communications using machine learning1 Oct 2026US 2026/0303557 A1Raymond James Financial, Inc.
- Enabling message archiving on encrypted message groups1 Oct 2026US 2026/0303558 A1Sentriqs, Inc.
- System and method for regulating electronic message transmissions1 Oct 2026US 2026/0303560 A1Intercontinental Exchange Holdings, Inc.
- System24 Sep 2026US 2026/0289166 A1SoftBank Group Corp.
Most cited
By later US patents
- System and method for filtering unsolicited electronic mail messages using data matching and heuristic processing1,075US 5,999,932 ABright Light Technologies, Inc. · 1999
- Automated post office based rule analysis of e-mail messages and other data objects for controlled distribution in network environments1,046US 6,073,142 APark City Group, Inc. · 2000
- Technique which utilizes a probabilistic classifier to detect "junk" e-mail by automatically updating a training and re-training the classifier based on the updated training set902US 6,161,130 AMicrosoft Corporation · 2000
- Dynamically matching users for group communications based on a threshold degree of matching of sender and recipient predetermined acceptance criteria842US 6,480,885 B12002
- Distributed content identification system805US 6,460,050 B12002