Erwin Hartmann

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Moriken, CH

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Patents Grantslast 30 patents

Information Patent Grant
Scaler for cleaning teeth
- Patent number 4,979,899
- Issue date Dec 25, 1990
- Romhild; Ludwig
- Ludwig Romhild
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Apparatus for sharpening periodontal instruments
- Patent number 4,854,080
- Issue date Aug 8, 1989
- Mikrona, AG
- Ludwig Romhild
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Dental instrument with a tool for treating the teeth
- Patent number 4,820,154
- Issue date Apr 11, 1989
- Romhild; Ludwig
- Ludwig Romhild
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Process and apparatus for cleaning a tooth
- Patent number 4,820,153
- Issue date Apr 11, 1989
- Romhild; Ludwig
- Ludwig Romhild
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE