Engracio Usi

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Jersey City, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Multiplication teaching aid
- Patent number 10,276,063
- Issue date Apr 30, 2019
- Engracio Usi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Addition and subtraction teaching aid
- Patent number 9,070,297
- Issue date Jun 30, 2015
- Engracio Usi
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS