Werner Bongers

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Iffeldorf, DE

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Patents Grantslast 30 patents

Information Patent Grant
Rotary percussion blow assisted drill
- Patent number 5,836,408
- Issue date Nov 17, 1998
- Hilti Aktiengesellschaft
- Werner Kleine
- E21 - EARTH DRILLING MINING
Information Patent Grant
Percussive blow assisted rotary drill
- Patent number 5,779,403
- Issue date Jul 14, 1998
- Hilti Aktiengesellschaft
- Werner Kleine
- E21 - EARTH DRILLING MINING