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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Manancero; Sergio O.
Address:
Maple Grove, MN
No. of patents:
1
Patents:












Patent Number Title Of Patent Date Issued
5297965 Mathematical and spatial toy apparatus March 29, 1994
A mathematical and spatial toy apparatus is arranged to include a grooved rack board arranged to receive individual block components to teach children the mathematical cumulative effect of such boards to provide rudimentary teaching in mathematical and spatial relationships.










 
 
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