Hans Helfrich

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Mannheim, DE

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Patents Grantslast 30 patents

Information Patent Grant
Foot control mechanism for a dental apparatus
- Patent number 5,423,231
- Issue date Jun 13, 1995
- Siemens Aktiengesellschaft
- Hans Helfrich
- A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
Information Patent Grant
Foot switch
- Patent number D342720
- Issue date Dec 28, 1993
- Siemens Aktiengesellschaft
- Tilman Phleps
- D13 - Equipment for production, distribution, or transformation of energy