H04J 3/0626
Plesiochronous multiplexing systems
Official title: {plesiochronous multiplexing systems, e.g. plesiochronous digital hierarchy [PDH], jitter attenuators}
H04J3/0626 (Plesiochronous multiplexing systems) appears on 261 US grants and 58 published applications in this corpus.
Search patents in H04J- Granted patents
- 261
- Published applications
- 58
- Assignees
- 133
- Inventors
- 484
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 0 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 8 | 0 |
| 1989 | 13 | 0 |
| 1990 | 10 | 0 |
| 1991 | 8 | 0 |
| 1992 | 9 | 0 |
| 1993 | 8 | 0 |
| 1994 | 18 | 0 |
| 1995 | 18 | 0 |
| 1996 | 20 | 0 |
| 1997 | 14 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 2 |
| 2003 | 3 | 5 |
| 2004 | 4 | 12 |
| 2005 | 3 | 2 |
| 2006 | 8 | 7 |
| 2007 | 6 | 3 |
| 2008 | 5 | 4 |
| 2009 | 4 | 5 |
| 2010 | 4 | 2 |
| 2011 | 4 | 1 |
| 2012 | 2 | 1 |
| 2013 | 3 | 3 |
| 2014 | 1 | 0 |
| 2015 | 2 | 1 |
| 2016 | 2 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 2 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 2 |
| 2023 | 3 | 3 |
| 2024 | 1 | 0 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method and apparatus for passing clock signals between time domains8 Jul 2025US 12,355,554 B1Marvell Asia Pte Ltd
- Techniques for enabling and disabling of a serializer/deserializer18 Feb 2025US 12,231,228 B2Micron Technology, Inc.
- Time synchronization of mesh network nodes7 Jan 2025US 12,191,984 B2Itron, Inc.
- Active-active TDM PW with asymmetry control28 May 2024US 11,996,932 B2Nokia Solutions and Networks Oy
- Method and apparatus for switching clock sources7 Nov 2023US 11,811,503 B2Telefonaktiebolaget LM Ericsson (publ)
- Techniques for enabling and disabling of a serializer/deserializer17 Jul 2025US 2025/0233680 A1Micron Technology, Inc.
- C-TDMA Protocols, TXOP Sharing Modes For Time Allocation, And Exchange Of Parameters In Multi-AP Systems6 Feb 2025US 2025/0048452 A1Mediatek Inc.
- Time synchronization of mesh network nodes30 Nov 2023US 2023/0388037 A1Itron, Inc.
- Techniques for enabling and disabling of a serializer/deserializer27 Jul 2023US 2023/0239062 A1Micron Technology, Inc.
- Active-active tdm pw with asymmetry control22 Jun 2023US 2023/0198647 A1Nokia Solutions and Networks Oy
Most cited
By later US patents
- Error correction and channel restoration apparatus for T1 digital links101US 5,506,956 ASprint Communications Co.L.P. · 1996
- Distributed switching system85US 4,858,232 ADSC Communications Corporation · 1989
- Delay control for frame-based transmission of data81US 5,559,796 ANational Semiconductor Corporation · 1996
- Encoder/decoder buffer control for variable bit-rate channel79US 5,565,924 ALucent Technologies Inc. · 1996
- Automatic vernier synchronization of skewed data streams70US 5,020,023 AInternational Business Machines Corporation · 1991