Mark R. Stewart

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Cambridge, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
System of illuminable modules for composing alphanumerics and decor...
- Patent number 4,932,878
- Issue date Jun 12, 1990
- Mark R. Stewart
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
System of modules for composing alphanumerics
- Patent number 4,877,405
- Issue date Oct 31, 1989
- Mark R. Stewart
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS