B61L 3/22
Using magnetic or electrostatic induction
Official title: using magnetic or electrostatic induction; using electromagnetic radiation
B61L3/22 (Using magnetic or electrostatic induction) appears on 178 US grants and 84 published applications in this corpus.
Search patents in B61L- Granted patents
- 178
- Published applications
- 84
- Assignees
- 92
- Inventors
- 295
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 8 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 1 | 0 |
| 1984 | 8 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 1 |
| 2003 | 2 | 3 |
| 2004 | 1 | 2 |
| 2005 | 2 | 6 |
| 2006 | 5 | 1 |
| 2007 | 2 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 4 |
| 2011 | 0 | 4 |
| 2012 | 2 | 1 |
| 2013 | 5 | 5 |
| 2014 | 3 | 7 |
| 2015 | 9 | 3 |
| 2016 | 4 | 4 |
| 2017 | 2 | 1 |
| 2018 | 2 | 8 |
| 2019 | 5 | 4 |
| 2020 | 2 | 3 |
| 2021 | 5 | 6 |
| 2022 | 6 | 6 |
| 2023 | 3 | 2 |
| 2024 | 6 | 3 |
| 2025 | 3 | 4 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- System and method for virtual block operational status control with long block time delay23 Dec 2025US 12,503,145 B2BNSF Railway Company
- Arrangement for train protection2 Sep 2025US 12,403,944 B2Siemens Mobility GmbH
- 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
- Sensor and Method for Detecting Target Molecules23 Oct 2025US 2025/0327795 A1Southern Methodist University
- Device for testing cab signaling system and a method thereof17 Jul 2025US 2025/0229813 A1
- Arrangement for train protection10 Apr 2025US 2025/0115284 A1Siemens Mobility GmbH
Most cited
By later US patents
- Accurate position-sensing and communications for guideway operated vehicles141US 6,011,508 AMagneMotion, Inc. · 2000
- Rail vision system117US 5,978,718 AWestinghouse Air Brake Company · 1999
- Integrated cab signal rail navigation system98US 5,995,881 AWestinghouse Air Brake Company · 1999
- Intelligent communications, command, and control system for a land-based vehicle83US 6,862,502 B2General Electric Company · 2005
- Fixed data transmission system for controlling train movement72US 5,452,870 AHarmon Industries, Inc. · 1995