1. Gelzer H J & Son Inc 56 N Howell St, Hillsdale, MI 49242 Coordinate: 41.92151,-84.63249 Phone: (517) 437-7650
2. Hillsdale Glass & Door Inc 2900 Lilac Rd, Hillsdale, MI 49242 Coordinate: 41.82241,-84.66849 Phone: (517) 437-4425