B61L 5/20
Audible signals
Official title: Audible signals, e.g. detonator {audible signalling}
B61L5/20 (Audible signals) appears on 6 US grants and 7 published applications in this corpus.
Search patents in B61L- Granted patents
- 6
- Published applications
- 7
- Assignees
- 7
- Inventors
- 15
- Latest grant
- 11 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 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 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 2 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Concealed asset locator11 Mar 2025US 12,246,766 B2Siemens Mobility GmbH
- Vehicle advisory system13 Apr 2021US 10,974,748 B1Westinghouse Air Brake Technologies Corporation
- Support structures for transportation systems23 Mar 2021US 10,957,967 B2Aecom
- Travel obstructing device30 Apr 2019US 10,272,931 B2Daifuku Co., Ltd.
- Crossing proximity and train-on-approach notification system24 Nov 2015US 9,193,367 B2The Island Radar Company
- Concealed asset locator8 Dec 2022US 2022/0388552 A1Siemens Mobility GmbH
- Supplemental shunting device indicator7 Jan 2021US 2021/0001901 A1National Railroad Passenger Corporation
- Support structures for transportation systems26 Sep 2019US 2019/0296419 A1Aecom
- Travel Obstructing Device3 May 2018US 2018/0118239 A1Daifuku Co., Ltd.
- Supplemental shunting device indicator5 Apr 2018US 2018/0093686 A1National Railroad Passenger Corporation
Most cited
By later US patents