David Lechtman

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Sasolburg, ZA

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Patents Grantslast 30 patents

Information Patent Grant
Terminating expansion of underground coal fires and protecting the...
- Patent number 9,724,548
- Issue date Aug 8, 2017
- Engineering Projects Management International Ltd
- David Lechtman
- A62 - LIFE-SAVING FIRE-FIGHTING

Patents Applicationslast 30 patents

Information Patent Application
Terminating Expansion Of Underground Coal Fires And Protecting The...
- Publication number 20170021207
- Publication date Jan 26, 2017
- Engineering Projects Management International Ltd
- David Lechtman
- E21 - EARTH DRILLING MINING