Joints between vertical props and horizontal top bars

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Patents Grantslast 30 patents

Information Patent Grant
Mine roof and rib support with reinforced channel
- Patent number 8,197,160
- Issue date Jun 12, 2012
- FCI Holdings Delaware, Inc.
- John C. Stankus
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof and rib support device
- Patent number 7,794,181
- Issue date Sep 14, 2010
- FCI Holdings Delaware, Inc.
- Richard M. Hendrick
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cap shoe
- Patent number 5,149,044
- Issue date Sep 22, 1992
- Bochumer Eisenhutte Heintzmann GmbH & Co. KG
- Werner Mennekes
- E21 - EARTH DRILLING MINING
Information Patent Grant
Non-crosslinked polyether-ketones which can be processed by a therm...
- Patent number 4,645,819
- Issue date Feb 24, 1987
- BASF Aktiengesellschaft
- Hans-Josef Sterzel
- E21 - EARTH DRILLING MINING
Information Patent Grant
Beam coupling
- Patent number 4,589,795
- Issue date May 20, 1986
- Caledonian Mining Company Ltd.
- Colin J. MacLeod
- E21 - EARTH DRILLING MINING
Information Patent Grant
2210788
- Patent number 2,210,788
- Issue date Aug 6, 1940
- E21 - EARTH DRILLING MINING
Information Patent Grant
1946720
- Patent number 1,946,720
- Issue date Feb 13, 1934
- E21 - EARTH DRILLING MINING
Information Patent Grant
1451840
- Patent number 1,451,840
- Issue date Apr 17, 1923
- E21 - EARTH DRILLING MINING