B61D 39/006
Opening and closing means
Official title: {Opening and closing means}
B61D39/006 (Opening and closing means) appears on 33 US grants and 37 published applications in this corpus.
Search patents in B61D- Granted patents
- 33
- Published applications
- 37
- Assignees
- 21
- Inventors
- 67
- Latest grant
- 29 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 2 | 3 |
| 2012 | 2 | 4 |
| 2013 | 4 | 2 |
| 2014 | 3 | 1 |
| 2015 | 1 | 2 |
| 2016 | 0 | 4 |
| 2017 | 3 | 0 |
| 2018 | 1 | 1 |
| 2019 | 2 | 3 |
| 2020 | 2 | 3 |
| 2021 | 0 | 2 |
| 2022 | 4 | 3 |
| 2023 | 2 | 4 |
| 2024 | 2 | 0 |
| 2025 | 2 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Hopper railroad car having top hatch cover assembly29 Apr 2025US 12,286,141 B2Gunderson LLC
- Cover assemblies for railroad cars21 Jan 2025US 12,202,529 B2Gunderson LLC
- Distributing items using multimodal delivery systems28 May 2024US 11,993,294 B2Amazon Technologies, Inc.
- Bridge crane apparatus for opening and closing railcar lids7 May 2024US 11,975,747 B2RayHawk Technologies Inc.
- Hopper railroad car having top hatch cover assembly1 Aug 2023US 11,713,061 B2Gunderson LLC
- Improved Automatic Hatch System for Trough Loaded Hopper Railcars9 Oct 2025US 2025/0313240 A1
- Structure for a substructure22 May 2025US 2025/0162490 A1
- Hopper railroad car having top hatch cover assembly12 Oct 2023US 2023/0322276 A1Gunderson LLC
- Bridge crane apparatus for opening and closing railcar lids28 Sep 2023US 2023/0303134 A1RayHawk Technologies Inc.
- Cover assemblies for railroad cars29 Jun 2023US 2023/0202535 A1Gunderson LLC
Most cited
By later US patents
- Tarpaulin tightening device24US 6,478,361 B12002
- Demand-based distribution of items using intermodal carriers and unmanned aerial vehicles16US 10,384,692 B2Amazon Technologies, Inc. · 2019
- Semi-rigid railcar cover11US 7,878,124 B2Ecofab Covers International Inc. · 2011
- System and method for powered railcar doors10US 8,701,565 B2Trinity Industries, Inc. · 2014
- Cover system for open top rail cars9US 8,256,355 B2Coalcap, LLC · 2012