4. Amusement devices: games
  5. Puzzles
  6. Take-aparts and put-togethers

Piet Hein

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Device for influencing an organism

Surgery – Sleep or relaxation inducing therapy – Sensory
Patent

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Puzzle

Amusement devices: games – Puzzles – Take-aparts and put-togethers
Patent

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Sundial

Geometrical instruments – Straight-line light ray type – Celestial
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Profile ID: LFUS-PAI-P-1227727

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