Manipulable puzzle

Games – toys – and sports goods – Toy – Representation or scale model

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2101

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D03954684

REFERENCES:
patent: D140371 (1945-02-01), Sewell
patent: 449881 (1891-04-01), Jackson
patent: 482957 (1892-09-01), Allen
patent: 1560921 (1925-11-01), Von Bultzingslowen
patent: 1693711 (1928-12-01), Fritz
The Greatest Puzzles of All Times by Matthew J. Costell, pp. 128, 129, 130, 131, and 145, published Jul. 20, 1988.
Recreation in Mathematics (Sliding Piece Puzzles) by L.E. Hordern published 1986 (6 pages).
Binary Arts HIKIMI Puzzle Collection Tokyo Parking and Instructions (In Japanese).

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