B61L 3/12
Using magnetic or electrostatic induction
Official title: using magnetic or electrostatic induction; using radio waves
B61L3/12 (Using magnetic or electrostatic induction) appears on 355 US grants and 391 published applications in this corpus.
Search patents in B61L- Granted patents
- 355
- Published applications
- 391
- Assignees
- 152
- Inventors
- 664
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 6 | 8 |
| 2003 | 8 | 20 |
| 2004 | 9 | 21 |
| 2005 | 11 | 16 |
| 2006 | 10 | 7 |
| 2007 | 13 | 7 |
| 2008 | 1 | 6 |
| 2009 | 5 | 7 |
| 2010 | 5 | 12 |
| 2011 | 3 | 12 |
| 2012 | 11 | 14 |
| 2013 | 12 | 12 |
| 2014 | 12 | 27 |
| 2015 | 15 | 23 |
| 2016 | 22 | 21 |
| 2017 | 21 | 14 |
| 2018 | 10 | 22 |
| 2019 | 22 | 35 |
| 2020 | 17 | 27 |
| 2021 | 21 | 22 |
| 2022 | 21 | 17 |
| 2023 | 13 | 13 |
| 2024 | 16 | 14 |
| 2025 | 15 | 8 |
| 2026 | 9 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and systems for decentralized rail signaling and positive train control6 Oct 2026US 12,752,823 B2Metrom Rail, LLC
- Methods and system for providing high-speed communication on high-speed railway9 Jun 2026US 12,649,503 B2Obshhestvo S Ogranichennoj Otvetsvennostyu “Dok”
- Method and system for transmitting enforceable instructions in vehicle control systems9 Jun 2026US 12,649,505 B2Transportation IP Holdings, LLC
- Vehicle communication system2 Jun 2026US 12,643,542 B2Transportation IP Holdings, LLC
- System and method for a virtual approach signal31 Mar 2026US 12,589,784 B2BNSF Railway Company
- Methods and systems for achieving vital ultra-wideband (uwb) based train control17 Sep 2026US 2026/0274312 A1Metrom Rail, LLC
- System and method for a virtual approach signal6 Aug 2026US 2026/0225629 A1BNSF Railway Company
- Wireless vehicle management system2 Jul 2026US 2026/0184355 A1Arup Ventures Limited
- Rail Vehicle Signal Enforcement and Separation Control9 Apr 2026US 2026/0097795 A1Metrom Rail, LLC
- System and method for locating a guided vehicle on a railway network26 Mar 2026US 2026/0084729 A1Siemens Rail Automation S.A.U.
Most cited
By later US patents
- Automated wireless preventive maintenance monitoring system for magnetic levitation (MAGLEV) trains and other vehicles243US 5,445,347 AHughes Aircraft Company · 1995
- Remote asset monitoring system172US 5,867,801 AGeneral Railway Signal Corporation · 1999
- Train location and control using spread spectrum radio communications153US 5,420,883 AHughes Aircraft Company · 1995
- System and method for automatic train operation132US 6,135,396 AGE Harris Railway Electronics, LLC · 2000
- Incremental train control system117US 5,533,695 AHarmon Industries, Inc. · 1996