E21D 15/325
By a clamping ring
Official title: {by a clamping ring}
E21D15/325 (By a clamping ring) appears on 7 US grants and 6 published applications in this corpus.
Search patents in E21D- Granted patents
- 7
- Published applications
- 6
- Assignees
- 4
- Inventors
- 5
- Latest grant
- 4 Nov 2008
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 2 | 0 |
| 2007 | 0 | 2 |
| 2008 | 4 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Yieldable prop having a restraint arrangement4 Nov 2008US 7,445,408 B2Jennmar Corporation
- Yieldable prop having a yield section24 Jun 2008US 7,390,147 B2Jennmar Corporation
- Yieldable prop22 Apr 2008US 7,360,971 B2Jennmar Corporation
- Yieldable prop26 Feb 2008US 7,334,968 B2Jennmar Corporation
- Yieldable prop having a yield section14 Nov 2006US 7,134,810 B2Jennmar Corporation
- Yieldable Prop Having A Yield Section15 Mar 2007US 2007/0059109 A1Jennmar Corporation
- Yieldable prop having a yield section8 Feb 2007US 2007/0031197 A1Jennmar Corporation
- Yieldable prop30 Jun 2005US 2005/0141971 A1Jennmar Corporation
- Yieldable prop having a yield section11 Nov 2004US 2004/0223815 A1Jennmar Corpotation
- Yieldable prop29 Apr 2004US 2004/0081518 A1Jennmar Corporation
Most cited
By later US patents
- Resilienty compressible support column for use in a mine12US 5,564,867 ABochumer Eisenhutte Heintzmann GmbH & Co. KG · 1996
- Yieldable prop having a yield section4US 7,134,810 B2Jennmar Corporation · 2006
- Yieldable prop4US 7,334,968 B2Jennmar Corporation · 2008
- Yieldable prop3US 7,114,888 B2Jennmar Corporation · 2006
- Yieldable prop having a yield section1US 7,390,147 B2Jennmar Corporation · 2008