> TOMBLINSON, HARBURN ASSOCIATES, ARCHITECTS & PLANNERS, INC Michigan Since: 1957 TOMBLINSON, HARBURN ASSOCIATES, ARCHITECTS & PLANNERS, INC
> ENVIRONMENTAL MAINTENANCE ENGINEERS, INC Michigan Since: 1997 ENVIRONMENTAL MAINTENANCE ENGINEERS, INC
> ALLIED BUILDING SERVICE CO OF DETROIT INC Michigan Since: 1948 ALLIED BUILDING SERVICE CO OF DETROIT INC
