TREA

Excel Shutter Systems, Inc.

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  • Phoenix, AZ, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rolling shutter system
    • Patent number 5,117,893
    • Issue date Jun 2, 1992
    • Excel Shutter Systems, Inc.
    • Donald L. Morrison
    • E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS