E21F 13/065
Scrapers
Official title: {Scrapers (digging devices guided by cables E02F3/54; combined with planing means E21C27/42)}
E21F13/065 (Scrapers) appears on 3 US grants and 3 published applications in this corpus.
Search patents in E21F- Granted patents
- 3
- Published applications
- 3
- Assignees
- 4
- Inventors
- 7
- Latest grant
- 16 Jul 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
By publication year.
Recent patents
- Mine mining system16 Jul 2019US 10,352,165 B2Komatsu Ltd.
- Chain drive or return arrangement and chain assembly and sprocket employed therein29 Jan 2013US 8,360,912 B2Caterpillar Global Mining Europe GmbH
- Chain drive or return arrangement and chain assembly and sprocket employed therein18 Oct 2011US 8,038,558 B2DBT GmbH
Most cited
By later US patents
- Chain drive or return arrangement and chain assembly and sprocket employed therein22US 8,038,558 B2DBT GmbH · 2011
- Chain drive or return arrangement and chain assembly and sprocket employed therein16US 8,360,912 B2Caterpillar Global Mining Europe GmbH · 2013
- Mine mining system2US 10,352,165 B2Komatsu Ltd. · 2019