4. Electric lamp and discharge devices
  5. With luminescent solid or liquid material
  6. Solid-state type

Demitsu Kosan Co., Ltd.

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Organic EL display device having conductive color changing...

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

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Retainer plate switching mechanism for optical component

Optical: systems and elements – Lens – With support
Reexamination Certificate

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