E21D 23/0095
Temporary supports at the driving front
Official title: {Temporary supports at the driving front}
E21D23/0095 (Temporary supports at the driving front) appears on 9 US grants and 1 published applications in this corpus.
Search patents in E21D- Granted patents
- 9
- Published applications
- 1
- Assignees
- 7
- Inventors
- 16
- Latest grant
- 27 Oct 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 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 | 0 | 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 | 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 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Active temporary roof support apparatus27 Oct 2020US 10,815,781 B2Sandvik Intellectual Property AB
- Heading shield13 Dec 1983US 4,420,278 ADowty (South Africa) (Proprietary) Limited
- Mining and bolting method and apparatus12 Jan 1982US 4,310,197 ALee-Norse Company
- Mobile mine roof support system29 Dec 1981US 4,307,982 AMining Machinery Development Corp.
- Tunnel roof supporting apparatus26 May 1981US 4,269,547 A
Most cited
By later US patents
- Underground mining machine having temporary roof support means and roof bolting means associated therewith24US 4,199,193 AAcme Machinery Company · 1980
- Mine roof support system15US 4,143,991 A1979
- Mobile mine roof support system7US 4,307,982 AMining Machinery Development Corp. · 1981
- Rock excavating arched tunnel forming machine4US 3,979,151 ACoal Industry (Patents) Limited · 1976
- Tunnel roof supporting apparatus4US 4,269,547 A1981