Puzzle

Games – toys – and sports goods – Toy – Coordination or hand-manipulative type

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2101

Patent

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D04023331

REFERENCES:
patent: D173360 (1954-11-01), Kerner et al.
patent: D253902 (1980-01-01), Schoentag
patent: D347866 (1994-06-01), Mikhail
patent: 1327388 (1920-01-01), Ince
Puzzles Old and New, How to Make and Solve Them, by Jerry Slocum and Jack Botermans; Tricycle shaped pentangle puzzles, Jan. 1986.

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