E21C 35/184
Reversible picks, i.e. having two working ends, one operating, the other in
Official title: {Reversible picks, i.e. having two working ends, one operating, the other in reserve}
E21C35/184 (Reversible picks, i.e. having two working ends, one operating, the other in) appears on 9 US grants and 4 published applications in this corpus.
Search patents in E21C- Granted patents
- 9
- Published applications
- 4
- Assignees
- 6
- Inventors
- 12
- Latest grant
- 10 May 2016
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
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| 1994 | 0 | 0 |
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| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
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| 2003 | 0 | 0 |
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| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Pick tool assembly and method of using same10 May 2016US 9,334,732 B2Element Six Limited
- Dirt and rock cutting bit tool15 Dec 2015US 9,212,553 B2The Sollami Company
- Sleeve for reversible cutting tool31 Jan 2012US 8,104,844 B2Sandvik Intellectual Property AB
- Reversible cutting tool with shield3 Nov 2009US 7,611,209 B2Sandvik Intellectual Property AB
- Reversible bit assembly22 Sep 1998US 5,810,102 A
- Pick tool assembly and method of using same24 Sep 2015US 2015/0267535 A1Element Six Limited
- Dirt and Rock Cutting Bit Tool14 May 2015US 2015/0130258 A1The Sollami Company
- Reversible cutting tool with shield28 Aug 2008US 2008/0202819 A1Sandvik Intellectual Property AB
- Sleeve for reversible cutting tool28 Aug 2008US 2008/0206002 A1Sandvik Intellectual Property AB
Most cited
By later US patents
- Milling tool for a rotating milling cylinder10US 4,298,233 A1981
- Reversible bit assembly10US 5,810,102 A1998
- Cutting drum for an open cast apparatus performing its winning action in both directions of travel8US 5,810,449 AMan Takraf Fordertechnik GmbH · 1998
- Rotary retainer for mining bits7US 4,607,891 AJoy Manufacturing Company · 1986
- Dirt and rock cutting bit tool3US 9,212,553 B2The Sollami Company · 2015