Magnetic manipulatives book
US5820383A · kind A · utility
20Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1997 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Apr 30, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2009/1033
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A book having at least one fold out page with a metal insert which assists the placement or arrangement of magnetic manipulatives onto a page of the book.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.