David A. Steiner

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Great Neck, NY, US

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Patents Applicationslast 30 patents

Information Patent Application
SELF-SCORING AND SELF-ANALYZING TEST ANSWER SHEET
- Publication number 20100112539
- Publication date May 6, 2010
- Howard I. Berrent
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
Self-scoring and self-analyzing test answer sheet
- Publication number 20060035203
- Publication date Feb 16, 2006
- Howard I. Berrent
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS