H04W 8/28
Number portability
Official title: Number portability {; Network address portability}
H04W8/28 (Number portability) appears on 267 US grants and 250 published applications in this corpus.
Search patents in H04W- Granted patents
- 267
- Published applications
- 250
- Assignees
- 123
- Inventors
- 538
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 11 | 2 |
| 2002 | 7 | 6 |
| 2003 | 8 | 10 |
| 2004 | 3 | 13 |
| 2005 | 4 | 18 |
| 2006 | 10 | 11 |
| 2007 | 11 | 8 |
| 2008 | 5 | 12 |
| 2009 | 6 | 5 |
| 2010 | 10 | 10 |
| 2011 | 9 | 4 |
| 2012 | 15 | 9 |
| 2013 | 10 | 7 |
| 2014 | 9 | 12 |
| 2015 | 9 | 9 |
| 2016 | 8 | 9 |
| 2017 | 10 | 3 |
| 2018 | 7 | 13 |
| 2019 | 15 | 7 |
| 2020 | 8 | 12 |
| 2021 | 10 | 23 |
| 2022 | 8 | 22 |
| 2023 | 21 | 8 |
| 2024 | 13 | 7 |
| 2025 | 7 | 8 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Proactive notification of wireless client address rotation14 Jul 2026US 12,684,341 B2Cisco Technology, Inc.
- Communication processing method of terminal information and related device14 Apr 2026US 12,604,354 B2Huawei Technologies Co., Ltd.
- System that manages access point multi-link device with multiple stations13 Jan 2026US 12,526,624 B2QUALCOMM Incorporated
- Method and system for determining a mobile network operator identifier16 Dec 2025US 12,500,978 B2TC France S.A.S.
- Multiple basic service set identifier (BSSID) beacon broadcast21 Oct 2025US 12,452,652 B2QUALCOMM Incorporated
- Fast basic service set transition for multi-link operation14 May 2026US 2026/0136177 A1QUALCOMM Incorporated
- System and method for communication8 Jan 2026US 2026/0012782 A1Jio Platforms Limited
- Core network assisted service discovery4 Sep 2025US 2025/0280287 A1InterDigital Patent Holdings, Inc.
- Network switching including client identifier query28 Aug 2025US 2025/0274739 A1
- Network switching including user profile field cloning28 Aug 2025US 2025/0274746 A1
Most cited
By later US patents
- Roaming encoded information reading terminal542US 8,611,309 B22013
- Multiple mode personal wireless communications system349US 5,594,782 AGTE Mobile Communications Service Corporation · 1997
- Methods and systems for universal, automatic service selection in a telecommunications signaling network256US 7,092,505 B2Tekelec · 2006
- Multiple mode personal wireless communications system163US 5,887,259 AGTE Mobile Communications Service Corporation · 1999
- Method for seamless port capability for an alternative service provider139US 6,898,413 B2Clearwire Corporation · 2005