Mark Howell

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Westonaria Extension, ZA

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Patents Grantslast 30 patents

Information Patent Grant
Mine support system
- Patent number 5,547,317
- Issue date Aug 20, 1996
- HL&H Timber Products (Pty) Limited
- Mark Howell
- E21 - EARTH DRILLING MINING
Information Patent Grant
Grout composition
- Patent number 5,454,866
- Issue date Oct 3, 1995
- H L & H Timber Products (Pty) Ltd.
- Gregory M. Gilbert
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Yieldable load support
- Patent number 5,318,387
- Issue date Jun 7, 1994
- H L & H Timber Products (Proprietary) Limited
- Frans R. P. Pienaar
- E21 - EARTH DRILLING MINING