Rudolf Gruber

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Millstatt am See, AT

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Patents Grantslast 30 patents

Information Patent Grant
Straddle cartridge for a straddle cartridge anchor
- Patent number 4,290,338
- Issue date Sep 22, 1981
- GD-Anker Gebirgs-Dubel-Anker GmbH & Co. KG
- Rudolf Gruber
- E21 - EARTH DRILLING MINING
Information Patent Grant
Tunnel-lagging element and system
- Patent number 4,112,694
- Issue date Sep 12, 1978
- GD Anker Gebirgs-Dubel-Anker GmbH & Co. KG
- Rudolf Gruber
- E21 - EARTH DRILLING MINING