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5848 N. 95th Ct.
Milwaukee, WI 53225

About ASI

  • Marathon High Speed, High Performance Door Systems

    • Designed to eliminate the need for high wear parts.
    • No roller wheels, belts, cables or extension springs to replace.
    • Doors open and close within seconds.
    • Available in custom sizes colors and styles including insulated or fenestrated grille style slats.
    • Marathon Doors are made in the U.S.A.

    Marathon, a division of ASI Doors, Inc. has been producing fast, reliable high performance doors since 1965.

    GSA Contract Holder #: GS0-7F-0813N
Competitors of ASI
  • DoorKing, Inc. (we are also known as “DKS”) was established in 1948 and is one of the country's leading manufacturers of telephone entry systems, vehicular gate operators, parking control products and access control systems in the United States. DoorKing was the first company to use... Read More
  • DeTect, Inc. specialises in applied, intelligent radar remote sensing technologies and systems for aviation safety, security and surveillance, environmental protection, renewable energy and environmental protection with over 500 radar systems delivered worldwide. DeTect's HARRIER security and... Read More
  • SightLogix manufactures a smart thermal detection system—the SightSensor—specifically designed for high performance in the outdoors. Since our inception in 2004, SightLogix has become a leader in the perimeter security market, and our system has been deployed at critical sites throughout the...