Johannes Nicolaas Jacobus CALITZ

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Gauteng, 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

Patents Applicationslast 30 patents

Information Patent Application
MOBILE UNDERGROUND TUNNEL BORER ARRANGEMENT
- Publication number 20200370434
- Publication date Nov 26, 2020
- DRILLING TECHNICAL SERVICS (PTY) LTD
- Barend Jacobus JORDAAN
- E21 - EARTH DRILLING MINING