Donald John Wierschke

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Lancaster, FR

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Patents Grantslast 30 patents

Information Patent Grant
Oxide cathode for electron gun with a differentially doped metallic...
- Patent number 7,208,864
- Issue date Apr 24, 2007
- Thomson Licensing
- Jean-Michel Roquais
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Oxide cathode for electron gun with a differentially doped metallic...
- Publication number 20060158086
- Publication date Jul 20, 2006
- Jean-Michel Roquais
- H01 - BASIC ELECTRIC ELEMENTS