H04Q 5/24
Selecting arrangements wherein two or more subscriber stations are connected by the
Official title: for two-party-line systems
H04Q5/24 (Selecting arrangements wherein two or more subscriber stations are connected by the) appears on 18 US grants and 7 published applications in this corpus.
Search patents in H04Q- Granted patents
- 18
- Published applications
- 7
- Assignees
- 14
- Inventors
- 28
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 2 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Data processing method, outdoor unit, indoor unit and computer-readable storage medium10 Mar 2026US 12,574,665 B2Zte Corporation
- Intercom system with integrated audio system2 Dec 2025US 12,490,002 B2Rugged Race Products, Inc.
- Man-machine dialogue mode switching method29 Oct 2024US 12,131,735 B2Ai Speech Co., Ltd.
- Walkie-talkie device, electronic apparatus, walkie-talkie information transmission method, and information transmission method18 May 2021US 11,012,551 B2Shenzhen Wistek Energy Co., Ltd.
- Method and device for adjusting frequencies of intercom apparatuses8 Oct 2019US 10,439,660 B2Beijing Xiaomi Mobile Software Co., Ltd.
- Intercom system with integrated audio system26 Feb 2026US 2026/0059211 A1Rugged Race Products, Inc.
- Data processing method, outdoor unit, indoor unit and computer-readable storage medium27 Jun 2024US 2024/0214710 A1Zte Corporation
- Intercom system with integrated audio system12 Oct 2023US 2023/0328411 A1Rugged Race Products, Inc.
- Man-machine dialogue mode switching method15 Dec 2022US 2022/0399020 A1Ai Speech Co., Ltd.
- Walkie-talkie device, electronic apparatus, walkie-talkie information transmission method, and information transmission method30 Jul 2020US 2020/0244790 A1Shenzhen Wistek Energy Co., Ltd.
Most cited
By later US patents
- Battery charging circuit38US 4,048,551 ABell Telephone Laboratories, Incorporated · 1977
- Capacity expander for telephone line27US 4,755,994 ARepublic Telcom Systems Corporation · 1988
- Subscriber drop-connected circuits12US 4,209,667 ATII Industries, Inc. · 1980
- Party line apparatus11US 4,310,723 A1982
- Station identification circuit arrangement4US 4,459,433 ATII Industries, Inc. · 1984