4. Typewriting machines
  5. Key-board or key lever-actuating mechanism
  6. Key-board including keys grouped to facilitate positioning...

Shih-Ming Cheng

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Ergonomic computer keyboard

Typewriting machines – Key-board or key lever-actuating mechanism – Key-board including keys grouped to facilitate positioning...
Patent

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Light guide plate and manufacturing method of the same

Illumination – Edge lighted panel – Light guide
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1305249

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