E21D 23/146
Transmission of signals and commands by cable
Official title: {Transmission of signals and commands by cable}
E21D23/146 (Transmission of signals and commands by cable) appears on 15 US grants and 4 published applications in this corpus.
Search patents in E21D- Granted patents
- 15
- Published applications
- 4
- Assignees
- 10
- Inventors
- 26
- Latest grant
- 25 Nov 2008
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 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 | 1 | 0 |
| 1991 | 3 | 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 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 3 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Longwall support control for controlling the movements of longwall support units in the longwall of a mine25 Nov 2008US 7,455,367 B2Tiefenbach Control Systems GmbH
- Control mechanism for the extension units in the longwall face of a mine25 Nov 2008US 7,455,368 B2Tiefenbach Control Systems GmbH
- Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine26 Aug 2008US 7,416,369 B2Tiefenbach Control Systems GmbH
- Method and a device for detecting the presence of personnel in underground mining28 Jan 2003US 6,512,312 B1DBT Automation GmbH
- Mining control system for adjusting the advance of mining tools26 Mar 2002US 6,361,119 B1Tiefenbach Bergbautechnik GmbH
- Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine5 Oct 2006US 2006/0220438 A1Tiefenbach Control Systems GmbH
- Timbering and walling control for controlling the movements of timbering and walling units in the coal face of a mine31 Aug 2006US 2006/0193702 A1Tiefenbach Control Systems GmbH
- Control mechanism for the extension units in the longwall face of a mine20 Jul 2006US 2006/0158016 A1Tiefenbach Control Systems GmbH
- Electrohydraulic control system16 Oct 2003US 2003/0194886 A1
Most cited
By later US patents
- Method and a device for detecting the presence of personnel in underground mining28US 6,512,312 B1DBT Automation GmbH · 2003
- Automatic longwall mining system and method26US 4,228,508 ABergwerksverband GmbH · 1980
- Mining control system for adjusting the advance of mining tools23US 6,361,119 B1Tiefenbach Bergbautechnik GmbH · 2002
- Apparatus for transmitting data19US 5,029,943 AGullick Dobson Limited · 1991
- Control of self-advancing mine roof supports18US 4,146,271 ADobson Park Industries Limited · 1979