B61L 7/08
Circuitry
B61L7/08 (Circuitry) appears on 54 US grants and 46 published applications in this corpus.
Search patents in B61L- Granted patents
- 54
- Published applications
- 46
- Assignees
- 38
- Inventors
- 121
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 2 | 2 |
| 2015 | 1 | 4 |
| 2016 | 1 | 3 |
| 2017 | 4 | 3 |
| 2018 | 1 | 2 |
| 2019 | 3 | 6 |
| 2020 | 2 | 3 |
| 2021 | 4 | 4 |
| 2022 | 6 | 3 |
| 2023 | 2 | 4 |
| 2024 | 1 | 3 |
| 2025 | 2 | 1 |
| 2026 | 4 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B61L 7/088Common line wire control using series of coded pulses22
- B61L 7/10For light signals11
- B61L 7/083Common line wire control using currents of different amplitudes, polarities, frequencies, or3
- B61L 7/081Direct line wire control1
- B61L 7/085Common line wire control using synchronous distributors0
- B61L 7/086Common line wire control using relay distributors0
Recent patents
- System and method for virtual block stick circuits7 Jul 2026US 12,673,707 B2BNSF Railway Company
- Railroad virtual track block system16 Jun 2026US 12,654,753 B2BNSF Railway Company
- Railway detection system, railway infrastructure and method for detecting the presence of a railway vehicle2 Jun 2026US 12,643,583 B2
- Full-electronic turnout security control system for train-to-train communication and method thereof27 Jan 2026US 12,537,715 B2Casco Signal Ltd.
- System and method for virtual block operational status control with long block time delay23 Dec 2025US 12,503,145 B2BNSF Railway Company
- Railroad virtual track block system8 Oct 2026US 2026/0307691 A1BNSF Railway Company
- Signal system switchover method, system, device and medium13 Aug 2026US 2026/0233767 A1Casco Signal Ltd.
- System and method for virtual block operational status control with long block time delay30 Apr 2026US 2026/0116439 A1BNSF Railway Company
- System and method for virtual block stick circuits30 Jan 2025US 2025/0033679 A1BNSF Railway Company
- Railway detection system, railway infrastructure and method for detecting the presence of a railway vehicle9 May 2024US 2024/0149931 A1ALSTOM Holdings
Most cited
By later US patents
- Dual-channel data processing system for railroad safety purposes40US 4,400,792 ASiemens Aktiengesellschaft · 1983
- Vehicle control unit29US 4,198,678 AInternational Standard Electric Corporation · 1980
- Radio-based railway switch control system25US 5,050,823 AGeneral Signal Corporation · 1991
- Vital interface system for railway signalling23US 4,611,291 AGeneral Signal Corporation · 1986
- Remote system for monitoring and controlling railroad wayside equipment22US 7,140,577 B2General Electric Company · 2006