H04Q 11/0421
Circuit arrangements therefor
Official title: {Circuit arrangements therefor}
H04Q11/0421 (Circuit arrangements therefor) appears on 226 US grants and 105 published applications in this corpus.
Search patents in H04Q- Granted patents
- 226
- Published applications
- 105
- Assignees
- 122
- Inventors
- 386
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 14 | 0 |
| 1999 | 13 | 0 |
| 2000 | 12 | 0 |
| 2001 | 15 | 8 |
| 2002 | 17 | 16 |
| 2003 | 19 | 15 |
| 2004 | 7 | 6 |
| 2005 | 8 | 11 |
| 2006 | 14 | 9 |
| 2007 | 7 | 3 |
| 2008 | 8 | 4 |
| 2009 | 4 | 4 |
| 2010 | 7 | 2 |
| 2011 | 3 | 0 |
| 2012 | 2 | 1 |
| 2013 | 3 | 2 |
| 2014 | 1 | 0 |
| 2015 | 2 | 2 |
| 2016 | 2 | 1 |
| 2017 | 1 | 0 |
| 2018 | 1 | 3 |
| 2019 | 2 | 3 |
| 2020 | 5 | 5 |
| 2021 | 5 | 4 |
| 2022 | 1 | 2 |
| 2023 | 3 | 1 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Time-division multi-channel transmission and reception system24 Feb 2026US 12,563,325 B2Electronics and Telecommunications Research Institute
- T-switch with shunt for improved receiver sensitivity19 Nov 2024US 12,149,267 B2QUALCOMM Incorporated
- T-switch with shunt for improved receiver sensitivity23 May 2023US 11,658,689 B2QUALCOMM Incorporated
- Routing quantum signals in the microwave domain using time dependent switching7 Mar 2023US 11,599,819 B2International Business Machines Corporation
- Communication system and method for an optical local area network7 Feb 2023US 11,575,444 B2
- Network architecture6 Aug 2026US 2026/0230732 A1UCL Business PLC
- Network architecture9 Jul 2026US 2026/0197566 A1UCL Business PLC
- Time-division multi-channel transmission and reception system6 Mar 2025US 2025/0080886 A1Electronics and Telecommunications Research Institute
- T-switch with shunt for imporved receiver sensitivity31 Aug 2023US 2023/0275602 A1QUALCOMM Incorporated
- Communication system and method for an optical local area network6 Oct 2022US 2022/0321224 A1
Most cited
By later US patents
- Network termination and methods for use therewith360US 10,154,493 B2AT&T Intellectual Property I, L. P. · 2018
- Communication server apparatus and method266US 5,668,857 ANetspeed, Inc. · 1997
- Coaxial cable/twisted pair cable telecommunications network architecture253US 6,546,016 B1AT&T Corp. · 2003
- Method and apparatus for packet communications signaling237US 5,115,431 AStratacom, Inc. · 1992
- Distributed control and storage for a large capacity messaging system222US 5,029,199 ABoston Technology, Inc. · 1991