H04Q 3/521
Using semiconductors in the switching stages
Official title: {using semiconductors in the switching stages}
H04Q3/521 (Using semiconductors in the switching stages) appears on 212 US grants and 49 published applications in this corpus.
Search patents in H04Q- Granted patents
- 212
- Published applications
- 49
- Assignees
- 98
- Inventors
- 326
- Latest grant
- 8 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 15 | 0 |
| 1978 | 21 | 0 |
| 1979 | 4 | 0 |
| 1980 | 8 | 0 |
| 1981 | 8 | 0 |
| 1982 | 8 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 7 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 7 | 0 |
| 1990 | 10 | 0 |
| 1991 | 11 | 0 |
| 1992 | 6 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 3 |
| 2003 | 3 | 5 |
| 2004 | 6 | 5 |
| 2005 | 4 | 4 |
| 2006 | 3 | 1 |
| 2007 | 3 | 7 |
| 2008 | 3 | 2 |
| 2009 | 4 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 3 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 3 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 4 |
| 2018 | 3 | 3 |
| 2019 | 3 | 3 |
| 2020 | 2 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Multi-die non-blocking crossbar switch8 Apr 2025US 12,273,668 B2Xilinx, Inc.
- Flexible redundancy using RF switch matrix7 Dec 2021US 11,196,456 B2Hughes Network Systems, LLC
- Flexible redundancy using RF switch matrix7 Apr 2020US 10,615,843 B2Hughes Network Systems, LLC
- Reconfigurable quantum routing21 Jan 2020US 10,540,603 B2Northrop Grumman Systems Corporation
- Cross bar switch structure for highly congested environments25 Jun 2019US 10,333,508 B2International Business Machines Corporation
- Multi-die non-blocking crossbar switch20 Jun 2024US 2024/0205570 A1Xilinx, Inc.
- Full-crossover multi-channel switching matrix for mimo circuits and systems operating in time and frequency domains1 Dec 2022US 2022/0385377 A1
- Flexible redundancy using rf switch matrix23 Jul 2020US 2020/0235778 A1Hughes Network Systems, LLC
- Reconfigurable quantum routing19 Dec 2019US 2019/0385088 A1Northrop Grumman Systems Corporation
- System and method for configuring a switch matrix on-board a vehicle based on network information21 Feb 2019US 2019/0058672 A1The Boeing Company
Most cited
By later US patents
- Modular multistage switch for a parallel computing system221US 5,123,011 AGeneral Electric Company · 1992
- Fault-tolerant array of cross-point switching matrices124US 4,605,928 AInternational Business Machines Corporation · 1986
- Programmable logic device123US 4,847,612 APlug Logic, Inc. · 1989
- Large crossbar switch implemented in FPGA83US 6,759,869 B1Xilinx, Inc. · 2004
- Programmable logic array interconnection matrix72US 4,433,331 ABell Telephone Laboratories, Incorporated · 1984