H04W 36/00224
Between packet switched [ps] and circuit switched [cs] network technologies
Official title: {between packet switched [PS] and circuit switched [CS] network technologies, e.g. circuit switched fallback [CSFB]}
H04W36/00224 (Between packet switched [ps] and circuit switched [cs] network technologies) appears on 1,104 US grants and 1,328 published applications in this corpus.
Search patents in H04W- Granted patents
- 1,104
- Published applications
- 1,328
- Assignees
- 214
- Inventors
- 1,834
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2002 | 1 | 2 |
| 2003 | 0 | 0 |
| 2004 | 1 | 6 |
| 2005 | 1 | 6 |
| 2006 | 1 | 13 |
| 2007 | 2 | 22 |
| 2008 | 1 | 21 |
| 2009 | 6 | 23 |
| 2010 | 12 | 56 |
| 2011 | 9 | 72 |
| 2012 | 24 | 68 |
| 2013 | 53 | 107 |
| 2014 | 81 | 94 |
| 2015 | 95 | 147 |
| 2016 | 137 | 125 |
| 2017 | 121 | 85 |
| 2018 | 110 | 72 |
| 2019 | 88 | 86 |
| 2020 | 76 | 63 |
| 2021 | 71 | 63 |
| 2022 | 58 | 53 |
| 2023 | 50 | 61 |
| 2024 | 41 | 44 |
| 2025 | 31 | 25 |
| 2026 | 34 | 14 |
By publication year. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Shared use of cellular networks to provide wireless services15 Sep 2026US 12,739,612 B2Charter Communications Operating, LLC
- Call switching method and apparatus, storage medium and mobile terminal15 Sep 2026US 12,739,720 B2Huizhou Tcl Mobile Communication Co., Ltd.
- Handling of user equipment (UE) context information after inter-system handover15 Sep 2026US 12,739,724 B2Telefonaktiebolaget LM Ericsson (publ)
- Method and system to improve IMS registration failure due to P-CSCF server connection failure25 Aug 2026US 12,719,938 B2Innopeak Technology, Inc.
- Method and apparatus for improving voice service quality in wireless communication system25 Aug 2026US 12,720,372 B2Samsung Electronics Co., Ltd.
- Inbound and outbound communication session and call control6 Aug 2026US 2026/0230556 A1MBTE Holdings Sweden AB
- Secure ip multimedia subsystem (ims) calls30 Jul 2026US 2026/0222453 A1Motorola Mobility LLC
- Method and apparatus for call connection23 Jul 2026US 2026/0214514 A1Honor Device Co., Ltd.
- Methods and apparatuses for a mobility robustness optimization (mro) mechanism of an inter-rat handover procedure23 Jul 2026US 2026/0214525 A1Lenovo (Beijing) Limited
- Unified Access Control for a Cellular Network23 Jul 2026US 2026/0214549 A1Apple Inc.
Most cited
By later US patents
- Activation sequence using permission based connection to network265US 9,420,496 B1Sprint Communications Co.L.P. · 2016
- Handover of wireless calls between systems supporting circuit and packet call models89US 6,721,565 B1Lucent Technologies Inc. · 2004
- Systems, methods and media for enhanced circuit-switched fallback interworking function signaling procedures for roaming user equipment51US 9,173,084 B1Cisco Technology, Inc. · 2015
- Method and apparatus for releasing connection with local GW when UE moves out of the residential/enterprise network coverage44US 9,301,333 B2BlackBerry Limited · 2016
- Wireless handoffs between multiple networks42US 8,275,377 B2QUALCOMM Incorporated · 2012