Three dimensional puzzle
United States Patent 3065970
US Patent References:
Scientific puzzle
- - 2900190


Inventors:
Sutton, Besley Serena
Publication Date:
11/27/1962
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Assignee:
Sutton, Besley Serena
Primary Class:
273/160
International Classes:
A63F9/12; A63F9/06
Foreign References:
GB190601154A
GB191011293A
AT169653B