Bertram L. Koslin

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Yorktown Heights, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Test answer and score sheet device
- Patent number 5,102,341
- Issue date Apr 7, 1992
- Touchstone Applied Science Associates, Inc.
- Bertram L. Koslin
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS