| Business | Phone |
| Baldwin Lambert Co 7827 River Rd, Marine City 48039 | (810) 765-1605 |
| Klingler Automatic 7217 Marsh Rd, Marine City 48039 | (810) 765-1096 |
| Mbt Co 205 Washington St, Marine City 48039 | (810) 765-9986 |
| Richmond Instruments & Systems 2009 S Parker St, Marine City 48039 | (810) 765-7973 |
| John Acre Inc 515 S Parker St, Marine City 48039 | (810) 765-5711 |