H04J 3/1623
Plesiochronous digital hierarchy [pdh]
Official title: {Plesiochronous digital hierarchy [PDH]}
H04J3/1623 (Plesiochronous digital hierarchy [pdh]) appears on 401 US grants and 119 published applications in this corpus.
Search patents in H04J- Granted patents
- 401
- Published applications
- 119
- Assignees
- 194
- Inventors
- 745
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 8 | 0 |
| 1986 | 5 | 0 |
| 1987 | 12 | 0 |
| 1988 | 9 | 0 |
| 1989 | 16 | 0 |
| 1990 | 13 | 0 |
| 1991 | 12 | 0 |
| 1992 | 13 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 15 | 0 |
| 1996 | 16 | 0 |
| 1997 | 15 | 0 |
| 1998 | 13 | 0 |
| 1999 | 22 | 0 |
| 2000 | 14 | 0 |
| 2001 | 11 | 3 |
| 2002 | 11 | 10 |
| 2003 | 16 | 14 |
| 2004 | 14 | 7 |
| 2005 | 15 | 6 |
| 2006 | 16 | 15 |
| 2007 | 9 | 5 |
| 2008 | 6 | 9 |
| 2009 | 15 | 9 |
| 2010 | 7 | 8 |
| 2011 | 8 | 5 |
| 2012 | 6 | 2 |
| 2013 | 9 | 6 |
| 2014 | 5 | 3 |
| 2015 | 6 | 0 |
| 2016 | 2 | 3 |
| 2017 | 0 | 3 |
| 2018 | 1 | 2 |
| 2019 | 2 | 2 |
| 2020 | 1 | 3 |
| 2021 | 3 | 0 |
| 2022 | 1 | 1 |
| 2023 | 2 | 2 |
| 2024 | 0 | 1 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and apparatus for sending and receiving multiframe, device, system, and storage medium24 Mar 2026US 12,587,298 B2Zte Corporation
- Service processing method and service processing device16 Dec 2025US 12,500,845 B2Zte Corporation
- Sensors with enhanced time division multiplexing frames22 Apr 2025US 12,284,248 B2STMicroelectronics S,r.l.
- Sensors with enhanced time division multiplexing frames12 Sep 2023US 11,757,995 B2STMicroelectronics S,r.l.
- Method and apparatus for sending and receiving multiframe, and storage medium31 Jan 2023US 11,569,923 B2Zte Corporation
- Service processing method and service processing device5 Sep 2024US 2024/0297849 A1Zte Corporation
- Sensors with enhanced time division multiplexing frames16 Nov 2023US 2023/0370524 A1STMicroelectronics S,r.l.
- Method and apparatus for sending and receiving multiframe, device, system, and storage medium20 Apr 2023US 2023/0118809 A1Zte Corporation
- Sensors with enhanced time division multiplexing frames27 Oct 2022US 2022/0345525 A1STMicroelectronics S,r.l.
- Method and apparatus for sending and receiving multiframe, and storage medium9 Apr 2020US 2020/0112383 A1Zte Corporation
Most cited
By later US patents
- Frequency agile broadband communications system258US 5,594,726 AScientific-Atlanta, Inc. · 1997
- Congestion avoidance in high-speed network carrying bursty traffic232US 5,029,164 ADigital Equipment Corporation · 1991
- Broadband communications system187US 5,499,241 AScientific-Atlanta, Inc. · 1996
- Data transmission over a communications link with variable transmission rates185US 6,307,867 B1Telefonaktiebolaget LM Ericsson (publ) · 2001
- Reverse path allocation and contention resolution scheme for a broadband communications system164US 5,581,555 AScientific-Atlanta, Inc. · 1996