Details
- TitlePatent No. 522,951 Improvements in or relating to Electron Discharge Devices
- ReferenceUK0108 NAEST 148/1/51
- Date1940-07-02
- Physical descriptionNumber of pieces: 1, Pages/folios: 6 + 1
- LanguageEnglish.
- Subject
- Conditions governing accessOpen access
- Level of descriptionfile
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