B61D 7/04
The openings being above axle level during discharge
Official title: the openings being above axle level during discharge
B61D7/04 (The openings being above axle level during discharge) appears on 17 US grants and 20 published applications in this corpus.
Search patents in B61D- Granted patents
- 17
- Published applications
- 20
- Assignees
- 7
- Inventors
- 35
- Latest grant
- 10 Dec 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 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 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 5 |
| 2011 | 2 | 1 |
| 2012 | 3 | 2 |
| 2013 | 1 | 0 |
| 2014 | 1 | 3 |
| 2015 | 0 | 1 |
| 2016 | 2 | 3 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 3 | 1 |
| 2020 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Engineering vehicle having ballast unloading device and ballast leveling device10 Dec 2019US 10,501,096 B2Crrc Yangtze Co., Ltd.
- Railroad car and door mechanism therefor26 Mar 2019US 10,239,542 B2National Steel Car Limited
- Rail road hopper car26 Feb 2019US 10,214,224 B2National Steel Car Limited
- Hopper car discharge structure5 Dec 2017US 9,834,230 B2National Steel Car Limited
- Rail road hopper car ridge fittings1 Mar 2016US 9,272,717 B2National Steel Car Limited
- A railway wagon21 May 2020US 2020/0156667 A1
- Railroad car and door mechanism therefor11 Jul 2019US 2019/0210621 A1National Steel Car Limited
- Engineering vehicle having ballast unloading device and ballast leveling device16 Nov 2017US 2017/0327130 A1Csr Yangze Co., Ltd.
- Hopper car discharge structure1 Dec 2016US 2016/0347331 A1National Steel Car Limited
- Rail road hopper car ridge fittings19 May 2016US 2016/0137210 A1National Steel Car Limited
Most cited
By later US patents
- Railway hopper car bolster assembly16US 4,348,962 ATrinity Industries, Inc. · 1982
- Rail road hopper car fittings and method of operation11US 7,703,397 B2National Steel Car Limited · 2010
- Railroad car and door mechanism therefor8US 8,356,560 B2National Steel Car Limited · 2013
- Railroad gondola car structure and mechanism therefor7US 8,132,515 B2National Steel Car Limited · 2012
- Rail road hopper car ridge fittings7US 8,622,004 B2National Steel Car Limited · 2014