B61J 3/02
Gravity shunting humps
Official title: Gravity shunting humps (track brakes or retarding apparatus fixed to permanent way B61K7/02)
B61J3/02 (Gravity shunting humps) appears on 4 US grants and 2 published applications in this corpus.
Search patents in B61J- Granted patents
- 4
- Published applications
- 2
- Assignees
- 2
- Inventors
- 9
- Latest grant
- 29 Sep 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1997 | 1 | 0 |
| 1998 | 1 | 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 | 2 |
| 2015 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for operating a switching hump system and control means for the same29 Sep 2015US 9,145,151 B2Siemens Aktiengesellschaft
- Method for operating a switching hump yard, and control device for a switching hump yard8 Sep 2015US 9,126,606 B2Siemens Aktiengesellschaft
- Automatic switching system for track-bound freight cars2 Jun 1998US 5,758,848 A
- Railway car retarder system14 Oct 1997US 5,676,337 AUnion Switch & Signal Inc.
Most cited
By later US patents
- Railway car retarder system40US 5,676,337 AUnion Switch & Signal Inc. · 1997
- Automatic switching system for track-bound freight cars38US 5,758,848 A1998
- Method for operating a switching hump system and control means for the same4US 9,145,151 B2Siemens Aktiengesellschaft · 2015
- Method for operating a switching hump yard, and control device for a switching hump yard1US 9,126,606 B2Siemens Aktiengesellschaft · 2015