Gerhard Pretorius

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FOCHVILLE, ZA

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Patents Grantslast 30 patents

Information Patent Grant
Mobile underground tunnel borer arrangement
- Patent number 11,434,762
- Issue date Sep 6, 2022
- DRILLING TECHNICAL SERVICES (PTY) LTD
- Barend Jacobus Jordaan
- E21 - EARTH DRILLING MINING
Information Patent Grant
Shaft enlargement arrangement for a boring system
- Patent number 10,947,845
- Issue date Mar 16, 2021
- MASTER SINKERS (PTY) LTD
- Barend Jacobus Jordaan
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
SHAFT ENLARGEMENT ARRANGEMENT FOR A BORING SYSTEM
- Publication number 20200018163
- Publication date Jan 16, 2020
- MASTER SINKERS (PTY) LTD
- Barend Jacobus Jordaan
- E21 - EARTH DRILLING MINING