with special parts to influence the friction

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Patents Grantslast 30 patents

Information Patent Grant
Mine props
- Patent number 5,868,527
- Issue date Feb 9, 1999
- HL & H Timber Products (Proprietary) Limited
- Richard George King
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine support post
- Patent number 5,228,810
- Issue date Jul 20, 1993
- Ben L. Seegmiller
- E21 - EARTH DRILLING MINING
Information Patent Grant
Yieldable mine post system
- Patent number 5,215,411
- Issue date Jun 1, 1993
- Ben L. Seegmiller
- E21 - EARTH DRILLING MINING
Information Patent Grant
2771136
- Patent number 2,771,136
- Issue date Nov 20, 1956
- B60 - VEHICLES IN GENERAL
Information Patent Grant
2745622
- Patent number 2,745,622
- Issue date May 15, 1956
- E21 - EARTH DRILLING MINING
Information Patent Grant
2744717
- Patent number 2,744,717
- Issue date May 8, 1956
- E21 - EARTH DRILLING MINING
Information Patent Grant
2670170
- Patent number 2,670,170
- Issue date Feb 23, 1954
- E21 - EARTH DRILLING MINING
Information Patent Grant
1852695
- Patent number 1,852,695
- Issue date Apr 5, 1932
- E21 - EARTH DRILLING MINING