Title:
Magnetic writing materials set
United States Patent 3036388
US Patent References:
/1074533.html
- - 1074533

Magnetic toy
- - 1549197

Magnetic toy
- - 2530013

Magnetic slate
- - 2589601


Inventors:
Tate, Clarence R.
Publication Date:
05/29/1962
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Assignee:
Tate, Clarence R.
Primary Class:
434/409
Other Classes:
446/131
International Classes:
B43L1/00