H04Q 3/54
In which the logic circuitry controlling the exchange is centralised
Official title: in which the logic circuitry controlling the exchange is centralised
H04Q3/54 (In which the logic circuitry controlling the exchange is centralised) appears on 794 US grants and 186 published applications in this corpus.
Search patents in H04Q- Granted patents
- 794
- Published applications
- 186
- Assignees
- 261
- Inventors
- 1,354
- Latest grant
- 11 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 37 | 0 |
| 1977 | 32 | 0 |
| 1978 | 18 | 0 |
| 1979 | 7 | 0 |
| 1980 | 15 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 7 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 16 | 0 |
| 1987 | 15 | 0 |
| 1988 | 8 | 0 |
| 1989 | 16 | 0 |
| 1990 | 12 | 0 |
| 1991 | 12 | 0 |
| 1992 | 10 | 0 |
| 1993 | 11 | 0 |
| 1994 | 19 | 0 |
| 1995 | 30 | 0 |
| 1996 | 37 | 0 |
| 1997 | 29 | 0 |
| 1998 | 44 | 0 |
| 1999 | 41 | 0 |
| 2000 | 67 | 0 |
| 2001 | 52 | 18 |
| 2002 | 41 | 27 |
| 2003 | 30 | 27 |
| 2004 | 10 | 16 |
| 2005 | 20 | 12 |
| 2006 | 14 | 16 |
| 2007 | 15 | 12 |
| 2008 | 14 | 11 |
| 2009 | 13 | 11 |
| 2010 | 8 | 3 |
| 2011 | 10 | 4 |
| 2012 | 11 | 2 |
| 2013 | 8 | 4 |
| 2014 | 5 | 2 |
| 2015 | 6 | 3 |
| 2016 | 4 | 4 |
| 2017 | 6 | 3 |
| 2018 | 4 | 3 |
| 2019 | 3 | 4 |
| 2020 | 3 | 0 |
| 2021 | 0 | 2 |
| 2022 | 3 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Static and dynamic input multiplexing for high-density neural signal recording11 Mar 2025US 12,248,629 B2Neuralink Corp.
- Apparatus with a controllable surface for underwater boundary flow9 May 2023US 11,643,169 B2Board of Trustees of Michigan State University
- Model parameter fusion method and apparatus28 Jun 2022US 11,373,116 B2Huawei Technologies Co., Ltd.
- Parallel signal processing system and method24 May 2022US 11,343,597 B1
- Methods and apparatuses for path selection in a packet network29 Mar 2022US 11,290,371 B2Coriant Operations, Inc.
- Software deployment workforce selection using security-based policy selection5 Mar 2026US 2026/0065178 A1Dell Products L. P.
- Static and dynamic input multiplexing for high-density neural signal recording31 Aug 2023US 2023/0273681 A1Neuralink Corp.
- Apparatus with a controllable surface for underwater boundary flow9 Sep 2021US 2021/0276665 A1Board of Trustees of Michigan State University
- System and method for failure curve analytics4 Mar 2021US 2021/0065086 A1Sap SE
- Method of integrating wired and wireless tank gauging systems on flexible common gateway hardware17 Oct 2019US 2019/0319821 A1Honeywell International Inc.
Most cited
By later US patents
- Personal communication service with mobility manager848US 5,329,578 ANorthern Telecom Limited · 1994
- System for changing software during computer operation409US 5,410,703 ATelefonaktiebolaget L M Ericsson · 1995
- Telephone control system with branch routing343US 5,375,161 AAccessLine Technologies, Inc. · 1994
- Method and apparatus for screening telephone calls329US 4,277,649 ABell Telephone Laboratories, Incorporated · 1981
- Method and apparatus for automating special service call handling311US 4,054,756 ABell Telephone Laboratories, Incorporated · 1977