4. Electric lamp and discharge devices
  5. Discharging devices with apertured electrode interposed...
  6. Plural-parallel-section cathode with electrode surrounding...
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Electron gun with improved cathode and shadow grid configuration

Electric lamp and discharge devices – Discharging devices with apertured electrode interposed... – Plural-parallel-section cathode with electrode surrounding...
Patent

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Electron source and producing method therefor

Electric lamp and discharge devices – Discharging devices with apertured electrode interposed... – Plural-parallel-section cathode with electrode surrounding...
Reexamination Certificate

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