4. Organic compounds -- part of the class 532-570 series
  5. Organic compounds
  6. Heterocyclic carbon compounds containing a hetero ring...

Po-Yu Chen

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Catalytic processes for esterification of carboxylic acids

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent

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Chlorination process with high para selectivity

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent

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Lens module with an adjustable lens unit

Photography – With exposure objective focusing means – focusing aid – or... – Mechanical mechanism for displacement of exposure objective
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

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

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