Marvin A. Silbermintz

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New York, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Calender formed from a cube puzzle
- Patent number 4,409,750
- Issue date Oct 18, 1983
- Ideal Toy Corporation
- Marvin A. Silbermintz
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS