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3564735
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Information
Patent Grant
3564735
References
Source
Patent Number
3,564,735
Date Filed
Not available
Date Issued
Tuesday, February 23, 1971
53 years ago
CPC
A63F9/12 - Three-dimensional jig-saw puzzles
A63F2009/124 - with a final configuration being a sphere
A63F2250/025 - related to sense of touch
Y10S273/27 - Blind and color blind
US Classifications
434 - Education and demonstration
273 - Amusement devices: games
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