B61L 1/20
Safety arrangements for preventing or indicating malfunction of the device
Official title: Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
B61L1/20 (Safety arrangements for preventing or indicating malfunction of the device) appears on 110 US grants and 74 published applications in this corpus.
Search patents in B61L- Granted patents
- 110
- Published applications
- 74
- Assignees
- 68
- Inventors
- 190
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 3 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 2 |
| 2010 | 1 | 3 |
| 2011 | 0 | 2 |
| 2012 | 3 | 1 |
| 2013 | 3 | 3 |
| 2014 | 1 | 6 |
| 2015 | 3 | 6 |
| 2016 | 3 | 6 |
| 2017 | 6 | 3 |
| 2018 | 7 | 9 |
| 2019 | 3 | 9 |
| 2020 | 9 | 2 |
| 2021 | 7 | 4 |
| 2022 | 6 | 6 |
| 2023 | 1 | 1 |
| 2024 | 1 | 2 |
| 2025 | 3 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Rail bond monitor18 Aug 2026US 12,709,313 B2Modular Railway Systems
- Rail contact element and drop off detection unit17 Feb 2026US 12,552,424 B2Thales Management & Services Deutschland GmbH
- Train simulator test set and method therefor30 Dec 2025US 12,509,131 B2BNSF Railway Company
- Method for monitoring railway points and points machine16 Sep 2025US 12,415,554 B2Indtact GmbH
- Train simulator test set and method therefor7 May 2026US 2026/0125087 A1BNSF Railway Company
- Method for monitoring railway points and points machine14 Aug 2025US 2025/0256747 A1Indtact GmbH
- Grade crossing system including grade crossing predictor in electrified propulsion territory12 Jun 2025US 2025/0187496 A1Siemens Mobility GmbH
- Cam follower assembly and dragging equipment detection system including the same29 May 2025US 2025/0171064 A1voestalpine SIGNALING Siershahn GmbH
- Self-detecting shunt bar3 Oct 2024US 2024/0326882 A1Dual Inventive Holding B.V.
Most cited
By later US patents
- Electrical utility communications and control system378US 7,274,305 B1Carina Technology, Inc. · 2007
- Thermal imaging-based vehicle analysis78US 8,335,606 B2International Electronic Machines Corp. · 2012
- Method and system for automated fault reporting63US 6,863,246 B2Quantum Engineering, Inc. · 2005
- Failsafe monitoring system with input controlled switch circuits33US 4,661,880 AThe Nippon Signal Co., Ltd. · 1987
- Infrared-based vehicle component imaging and analysis30US 9,134,185 B2International Electronic Machines Corp. · 2015