Charles Coffin

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Chur, CH

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Patents Grantslast 30 patents

Information Patent Grant
Percussion borer for forming bores in stone material
- Patent number 6,640,914
- Issue date Nov 4, 2003
- Hilti Aktiengesellschaft
- Erich Wisser
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
Percussion borer for forming bores in stone material
- Publication number 20020153173
- Publication date Oct 24, 2002
- Erich Wisser
- B28 - WORKING CEMENT, CLAY, OR STONE