Horst Seifert

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Hamburg, DT

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing grid electrodes for electron tubes
- Patent number 4,034,031
- Issue date Jul 5, 1977
- U.S. Philips Corporation
- Bernhard Lersmacher
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Dispenser cathode for a grid-controlled electron tube and method of...
- Patent number 4,031,425
- Issue date Jun 21, 1977
- U.S. Philips Corporation
- Reinhard Ziegler
- H01 - BASIC ELECTRIC ELEMENTS