H04M 9/025
Time division multiplex systems
Official title: {Time division multiplex systems, e.g. loop systems}
H04M9/025 (Time division multiplex systems) appears on 92 US grants and 17 published applications in this corpus.
Search patents in H04M- Granted patents
- 92
- Published applications
- 17
- Assignees
- 48
- Inventors
- 140
- Latest grant
- 28 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 3 |
| 2006 | 3 | 3 |
| 2007 | 2 | 0 |
| 2008 | 3 | 3 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 2 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 2 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- TDD time slot splitting28 Jan 2025US 12,212,718 B2Telefonaktiebolaget LM Ericsson (publ)
- TDD time slot splitting2 Aug 2022US 11,405,508 B2Telefonaktiebolaget LM Ericsson (publ)
- TDD time slot splitting4 Jul 2017US 9,699,322 B2Telefonaktiebolaget LM Ericsson (publ)
- Subframes in a cellular communications system11 Aug 2015US RE45,653 E1Telefonaktiebolaget'l M Ericsson (Publ)
- TDD time slot splitting1 Jul 2014US 8,767,697 B2Telefonaktiebolaget'l M Ericsson (Publ)
- Tdd time slot splitting20 Oct 2022US 2022/0337705 A1Telefonaktiebolaget LM Ericsson (publ)
- Tdd time slot splitting28 Sep 2017US 2017/0279969 A1Telefonaktiebolaget LM Ericsson (publ)
- Dynamic network routing decision processes and systems19 Mar 2015US 2015/0079999 A1Highbeam Inc.
- TDD Time Slot Splitting1 Jan 2015US 2015/0003303 A1Telefonaktiebolaget'l M Ericsson (Publ)
- Telephone communication system over a single telephone line6 Dec 2012US 2012/0307990 A1Mosaid Technologies Incorporated
Most cited
By later US patents
- Distributed variable bandwidth switch for voice, data, and image communications184US 4,587,651 ACXC Corporation · 1986
- Telephone communication system over a single telephone line157US 7,106,721 B1Serconet Ltd. · 2006
- Variable bandwidth switching system154US 4,679,191 ACXC Corporation · 1987
- Hospital signaling and communications system149US 4,967,195 A1990
- Method and apparatus for delivering secured telephone service in hybrid coaxial cable network147US 5,469,495 AU S West Advanced Technologies, Inc. · 1995