Title:
Magnetic writing materials set
United States Patent 3036388
Inventors:
Tate, Clarence R.
Publication Date:
05/29/1962
Export Citation:
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Assignee:
Tate, Clarence R.
Primary Class:
434/409
Other Classes:
446/131
International Classes:
B43L1/00; B43L1/00
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US Patent References:
2589601Magnetic slate
2530013Magnetic toy
1549197Magnetic toy
1074533N/A