| 631 | Marine Sirens | Company Product |
| 632 | Marine Stainless Steel Fabrication | Company Product |
| 633 | Marine Steering Systems | Company Product |
| 634 | Marine Surveyors | Company Product |
| 635 | Marine Switches | Company Product |
| 636 | Marine Swivels | Company Product |
| 637 | Marine Systems | Company Product |
| 638 | Marine TV Antennas | Company Product |
| 639 | Marine Tackle | Company Product |
| 640 | Marine Toilets | Company Product |
| 641 | Marine Towing | Company Product |
| 642 | Marine Transmission, Parts & Services | Company Product |
| 643 | Marine Travel Agencies | Company Product |
| 644 | Marine Vacuum | Company Product |
| 645 | Marine Vacuum Cleaners | Company Product |
| 646 | Marine Vinyl | Company Product |
| 647 | Marine Wall Panels | Company Product |
| 648 | Marine Warning Lights | Company Product |
| 649 | Marine Water Distillation Equipment | Company Product |
| 650 | Marine Winches | Company Product |
| 651 | Marine Window Wipers | Company Product |
| 652 | Marine Windows | Company Product |
| 653 | Marine Wires | Company Product |
| 654 | Marine Wood Decking | Company Product |
| 655 | Maritime Cleaning | Company Product |
| 656 | Maritime Communications | Company Product |
| 657 | Maritime Satelite Communications | Company Product |
| 658 | Markers | Company Product |
| 659 | Market Research & Analysis | Company Product |
| 660 | Marketing Agency | Company Product |