4. Optical: systems and elements
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Invertible display with a kaleidoscope

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
Patent

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Kaleidoscope

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
Reexamination Certificate

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Kaleidoscope kit

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
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Kaleidoscope structure

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
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Kaleidoscope with improved objective illumination

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
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Liquid filled kaleidoscope

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
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Multi-ocular kaleidoscope

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
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Power-propelled kaleidoscope

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
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Rotating wheel image maker

Optical: systems and elements – Kaleidoscope – Including particles loosely housed for agitation
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