E21D 11/24
Knuckle joints or links between arch members
E21D11/24 (Knuckle joints or links between arch members) appears on 4 US grants and 3 published applications in this corpus.
Search patents in E21D- Granted patents
- 4
- Published applications
- 3
- Assignees
- 6
- Inventors
- 15
- Latest grant
- 17 Sep 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 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 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- High-strength confined concrete support system for underground tunnel17 Sep 2019US 10,415,387 B2Shandong Tianqin Mining Machinery Equipment Co. Ltd.
- Rib for supporting and reinforcing an excavation21 Jul 2015US 9,085,977 B2Elas Geotecnica S.R.L.
- Fishplate11 Aug 1987US 4,685,839 AHollybank Engineering Company Limited
- Process and device for the assembly of voussoirs for tunnel linings9 Mar 1982US 4,318,637 APont-A-Mousson S. A.
- High-strength confined concrete support system for underground tunnel11 Oct 2018US 2018/0291736 A1Shandong Tianqin Mining Machinery Equipment Co. Ltd.
- Device for connecting the structural elements of ribs and reticular structures6 Apr 2017US 2017/0096895 A1Officine Maccaferri Italia S.R.L.
- Rib for supporting and reinforcing an excavation29 Nov 2012US 2012/0301223 A1Elas Geotecnica S.R.L.
Most cited
By later US patents