B61L 7/088
Common line wire control using series of coded pulses
Official title: {Common line wire control using series of coded pulses}
B61L7/088 (Common line wire control using series of coded pulses) appears on 22 US grants and 15 published applications in this corpus.
Search patents in B61L- Granted patents
- 22
- Published applications
- 15
- Assignees
- 11
- Inventors
- 32
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 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 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 2 | 3 |
| 2022 | 3 | 2 |
| 2023 | 1 | 2 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- System and method for virtual block stick circuits15 Oct 2024US 12,116,028 B2BNSF Railway Company
- Railroad virtual track block system26 Sep 2023US 11,767,041 B2BNSF Railway Company
- Railroad virtual track block system8 Oct 2026US 2026/0307691 A1BNSF Railway Company
- 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
- Railroad virtual track block system4 Jan 2024US 2024/0001975 A1BNSF Railway Company
- System and method for virtual block operational status control with long block time delay1 Jun 2023US 2023/0166780 A1BNSF Railway Company
Most cited
By later US patents
- 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
- Communications system18US 4,127,845 AGeneral Signal Corporation · 1978
- Bucket brigade circuits15US 4,107,550 AInternational Business Machines Corporation · 1978