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3747217
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Information
Patent Grant
3747217
References
Source
Patent Number
3,747,217
Date Filed
Not available
Date Issued
Tuesday, July 24, 1973
51 years ago
CPC
B43L7/0275 - Triangles
B43L7/04 - with rollers
US Classifications
033 - Geometrical instruments
D10 - Measuring, testing, or signalling instruments
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