Frans R. P. Pienaar

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Transvaal, ZA

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Patents Grantslast 30 patents

Information Patent Grant
Prop headboard
- Patent number 5,658,099
- Issue date Aug 19, 1997
- HL & H Timber Products (Propreitary) Limited
- Frans Roelof Petrus Pienaar
- E21 - EARTH DRILLING MINING
Information Patent Grant
Spacer assembly and method
- Patent number 5,435,670
- Issue date Jul 25, 1995
- HL&H Timber Products (Proprietary) Limited
- Frans R. P. Pienaar
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine prop headboard
- Patent number 5,427,476
- Issue date Jun 27, 1995
- HL&H Timber Products (PTY) Ltd.
- Frans R. P. Pienaar
- E21 - EARTH DRILLING MINING
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
Information Patent Grant
Preload headboard for an elongate prop
- Patent number 5,288,178
- Issue date Feb 22, 1994
- HL&H Timber Products (PTY) Ltd.
- Frans R. P. Pienaar
- E21 - EARTH DRILLING MINING
Information Patent Grant
Prop preloading apparatus
- Patent number 5,149,228
- Issue date Sep 22, 1992
- HL&H Timber Products (Proprietary) Limited
- Frans R. P. Pienaar
- E21 - EARTH DRILLING MINING