4. Optical: systems and elements
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Hand-held electronic appliance with optional magnifying...

Optical: systems and elements – Lens – With viewed object or viewed field illumination
Reexamination Certificate

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Hand-held magnifying device

Optical: systems and elements – Lens – With viewed object or viewed field illumination
Patent

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Handheld illuminating magnifier

Optical: systems and elements – Lens – With viewed object or viewed field illumination
Reexamination Certificate

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Handheld magnifying device incorporating a circular array of...

Optical: systems and elements – Lens – With viewed object or viewed field illumination
Reexamination Certificate

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Head belt of head magnifying glass

Optical: systems and elements – Lens – With viewed object or viewed field illumination
Reexamination Certificate

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