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

Boon Kheng Lee

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High resolution optical encoder with an angular collimated...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate

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Light emitting diode

Equipment for production – distribution – or transformation of ene – Distribution – modification or control – Electron or vacuum tube
Design Patent

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Light emitting diode based light source emitting collimated...

Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Reflector
Reexamination Certificate

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Light emitting diode with gradient index layering

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

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Light-emitting diode incorporating gradient index element

Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – With reflector – opaque mask – or optical element integral...
Reexamination Certificate

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