4. Electricity: measuring and testing
  5. Using ionization effects
  6. For analysis of gas, vapor, or particles of matter

Lei-Mei Sheng

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Cold cathode device and vacuum gauge using same

Electricity: measuring and testing – Using ionization effects – For monitoring pressure
Reexamination Certificate

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Double-faced field emission display device

Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Reexamination Certificate

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Double-faced light emitting diode display

Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate

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Field emission cathode and light source apparatus using same

Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Reexamination Certificate

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Field emission luminescent light source within a bulb

Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2972494

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