Rolf Birkmann

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Laaber, DE

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Patents Grantslast 30 patents

Information Patent Grant
Hermetically tight glass-metal housing for semiconductor components...
- Patent number 4,940,855
- Issue date Jul 10, 1990
- Siemens Aktiengesellschaft
- Guenther Waitl
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optoelectronic coupling element and method for its manufacture
- Patent number 4,875,750
- Issue date Oct 24, 1989
- Siemens Aktiengesellschaft
- Werner Spaeth
- G02 - OPTICS