4. Optics: eye examining, vision testing and correcting
  5. Spectacles and eyeglasses

Sigma Co., Ltd.

Corporate Assignee

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Corporate Assignee

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Impeller

Fluid reaction surfaces (i.e. – impellers) – Rotor having flow confining or deflecting web – shroud or... – Radially extending web or end plate
Reexamination Certificate

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Soldering material for spectacle frame and spectacle frame in wh

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses
Patent

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Spectacle frame

Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses
Patent

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