TREA

Trig.o.metrics Corporation

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  • Manning, SC, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Perspective drawing machine
    • Patent number 4,899,454
    • Issue date Feb 13, 1990
    • Trig.o.metrics Corporation
    • John G. R. Francis
    • B43 - WRITING OR DRAWING IMPLEMENTS BUREAU ACCESSORIES

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