H04L 25/26
Circuits with optical sensing means , i.e. using opto-couplers for isolation
Official title: Circuits with optical sensing means {, i.e. using opto-couplers for isolation}
H04L25/26 (Circuits with optical sensing means , i.e. using opto-couplers for isolation) appears on 45 US grants and 10 published applications in this corpus.
Search patents in H04L- Granted patents
- 45
- Published applications
- 10
- Assignees
- 38
- Inventors
- 72
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 2 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 2 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Cross domain key management17 Jun 2025US 12,333,530 B2
- Node unit and method of processing signal for distributed antenna system1 Jun 2021US 11,025,306 B2SOLiD, INC.
- Small cell base stations having drone-mounted radio units and related systems and methods3 Dec 2019US 10,498,566 B2CommScope Technologies LLC
- Distributed combined junctional transformer7 Nov 2017US 9,813,266 B2
- Circuit arrangement having an overload protection for galvanic isolation units22 Sep 2015US 9,142,950 B2WAGO Verwaltungsgesellschaft mbH
- Cross domain key management6 Feb 2025US 2025/0045742 A1Coinbase, Inc.
- Small cell base stations having drone-mounted radio units and related systems and methods4 Oct 2018US 2018/0287833 A1CommScope Technologies LLC
- Data delivery system, communication device, and communication control method6 Sep 2018US 2018/0254978 A1Kabushiki Kaisha Toshiba
- Node unit and method of processing signal for distributed antenna system14 Dec 2017US 2017/0359103 A1SOLiD, INC.
- Distributed Combined Junctional Transformer28 Jan 2016US 2016/0028468 A1
Most cited
By later US patents
- Electro-optical isolator circuit for line powered modem136US 4,417,099 AUniversal Data Systems, Inc. · 1983
- Line driver system64US 4,024,501 AThe Standard Oil Company · 1977
- Intrinsically safe multi-drop communications link53US 4,691,384 ATechnical Oil Tools Corporation · 1987
- Data receiving and processing circuit45US 4,241,455 ASperry Corporation · 1980
- Communication link42US 4,423,319 AMicronic AB · 1983