B61L 23/168
Using coded current
Official title: {using coded current}
B61L23/168 (Using coded current) appears on 34 US grants and 20 published applications in this corpus.
Search patents in B61L- Granted patents
- 34
- Published applications
- 20
- Assignees
- 15
- Inventors
- 35
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
| 2021 | 3 | 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
- 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
- System and method for virtual block operational status control with long block time delay23 Dec 2025US 12,503,145 B2BNSF Railway Company
- 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
- Coded track circuit repeater having standby mode32US 5,465,926 AUnion Switch & Signal Inc. · 1995
- Railroad motion detecting and signalling system with repeater receiver27US 3,974,991 AErico Rail Products Company · 1976
- Master-Satellite railway track circuit25US 5,145,131 AUnion Switch & Signal Inc. · 1992
- Cab signal apparatus and method24US 5,459,663 AUnion Switch & Signal Inc. · 1995
- Signal control system18US 4,369,942 ASafetran Systems Corporation · 1983