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    AngelBacked

    S.i. Systems

    Angel investors who backed S.i. Systems

    4 investors in our database backed S.i. Systems.

    Timothy Billings

    Senior Partner

    Quad-C Management, Inc.

    Frank Winslow

    Senior Partner

    Quad-C Management, Inc.

    Spencer Burkholder

    Principal

    Quad-C Management, Inc.

    Michael Brooks

    Partner

    Quad-C Management, Inc.

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