Details of mine caps for engaging the tops of pit-props, with or without retaining-plates Retaining-plates

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Patents Grantslast 30 patents

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
Heavy duty adjustable prop with a ball-and-socket joint
- Patent number 4,231,672
- Issue date Nov 4, 1980
- Charbonnages de France
- Guy Blanpain
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine roof supports
- Patent number 4,095,432
- Issue date Jun 20, 1978
- Fletcher Sutcliffe Wild Limited
- Arthur Scarfe
- E21 - EARTH DRILLING MINING
Information Patent Grant
Ball-and-socket type connections for use with mining apparatus
- Patent number 4,004,771
- Issue date Jan 25, 1977
- Gewerkschaft Eisenhutte Westfalia
- Lubomir Plevak
- E21 - EARTH DRILLING MINING
Information Patent Grant
3782673
- Patent number 3,782,673
- Issue date Jan 1, 1974
- E21 - EARTH DRILLING MINING
Information Patent Grant
3722846
- Patent number 3,722,846
- Issue date Mar 27, 1973
- E21 - EARTH DRILLING MINING
Information Patent Grant
3425656
- Patent number 3,425,656
- Issue date Feb 4, 1969
- E21 - EARTH DRILLING MINING
Information Patent Grant
3237903
- Patent number 3,237,903
- Issue date Mar 1, 1966
- E21 - EARTH DRILLING MINING