E21D 23/0472
Supports specially adapted for people walking or transporting material
Official title: {Supports specially adapted for people walking or transporting material}
E21D23/0472 (Supports specially adapted for people walking or transporting material) appears on 6 US grants and 1 published applications in this corpus.
Search patents in E21D- Granted patents
- 6
- Published applications
- 1
- Assignees
- 6
- Inventors
- 16
- Latest grant
- 9 Nov 1982
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 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 | 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 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Continuous sliding support gantry for a large passage9 Nov 1982US 4,358,224 ACharbonnages de France
- Sliding supporting gallery7 Sep 1982US 4,348,138 ACharbonnages de France
- Sheltering apparatus for use in long wall mining19 Feb 1980US 4,189,257 ATaiheiyo Engineering Inc.
- Self-advancing mine roof supports25 Jul 1978US 4,102,140 AGullick Dobson Limited
- Apparatus for protecting of coal mine workers10 Jan 1978US 4,067,618 ATaiheiyo Engineering Inc.
Most cited
By later US patents
- Sliding supporting gallery6US 4,348,138 ACharbonnages de France · 1982
- Longwall mining roof support for double deck machines4US 4,029,361 AGewerkschaft Eisenhutte Westfalia · 1977
- Apparatus for protecting of coal mine workers4US 4,067,618 ATaiheiyo Engineering Inc. · 1978
- Sheltering apparatus for use in long wall mining4US 4,189,257 ATaiheiyo Engineering Inc. · 1980
- Self-advancing mine roof supports3US 4,102,140 AGullick Dobson Limited · 1978