H04L 12/50
Circuit switching systems, i.e. systems in which the path is physically permanent
Official title: Circuit switching systems, i.e. systems in which the path is physically permanent during the communication
H04L12/50 (Circuit switching systems, i.e. systems in which the path is physically permanent) appears on 244 US grants and 124 published applications in this corpus.
Search patents in H04L- Granted patents
- 244
- Published applications
- 124
- Assignees
- 121
- Inventors
- 445
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 11 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 8 | 0 |
| 1986 | 3 | 0 |
| 1987 | 8 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 7 | 0 |
| 1991 | 7 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 4 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 3 |
| 2007 | 2 | 3 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 4 | 6 |
| 2011 | 2 | 4 |
| 2012 | 5 | 21 |
| 2013 | 3 | 7 |
| 2014 | 13 | 6 |
| 2015 | 14 | 10 |
| 2016 | 12 | 4 |
| 2017 | 8 | 12 |
| 2018 | 9 | 8 |
| 2019 | 8 | 6 |
| 2020 | 9 | 8 |
| 2021 | 6 | 4 |
| 2022 | 11 | 4 |
| 2023 | 5 | 5 |
| 2024 | 3 | 2 |
| 2025 | 2 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Switch matrix topology for routing high frequency signals5 May 2026US 12,621,186 B2BAE Systems Information and Electronic Systems Integration Inc.
- Terminal for performing repetition transmission of an uplink signal using an uplink shared channel for a repetition transmission type a of the uplink shared channel28 Apr 2026US 12,615,624 B2Ntt Docomo, Inc.
- Communication system, distribution device, data distribution method and program14 Oct 2025US 12,445,372 B2NTT, Inc.
- Systems and methods for exporting, publishing, browsing and installing on-demand applications in a multi-tenant database environment4 Mar 2025US 12,242,835 B2Salesforce, Inc.
- Private network request forwarding27 Aug 2024US 12,074,852 B1United Services Automobile Association (USAA)
- Address assignment method in a communication network28 Aug 2025US 2025/0274431 A1WAGO Verwaltungsgesellschaft mbH
- Switch matrix topology for routing high frequency signals2 Jan 2025US 2025/0007755 A1BAE Systems Information and Electronic Systems Integration Inc.
- Terminal1 Aug 2024US 2024/0260009 A1Ntt Docomo, Inc.
- Antenna pass through module11 Apr 2024US 2024/0120694 A1Lunar Energy, Inc.
- Communication system, distribution device, data distribution method and program26 Oct 2023US 2023/0344753 A1Nippon Telegraph and Telephone Corporation
Most cited
By later US patents
- Digital crossbar switch258US 4,852,083 ATexas Instruments Incorporated · 1989
- Private network request forwarding128US 9,930,011 B1United Services Automobile Association (USAA) · 2018
- Data line interface for a time-division multiplexing (TDM) bus106US 4,485,470 ARolm Company · 1984
- High speed network switch102US 5,604,735 AFinisar Corporation · 1997
- Method and arrangement for transmitting data between a central data station and a plurality of data terminals in a local area network98US 5,107,260 ASiemens Aktiengesellschaft · 1992