| 841 | Direct Level Gauges | Company Product |
| 842 | Direct Mail Advertising | Company Product |
| 843 | Direct Mail Service | Company Product |
| 844 | Direct Operated 2 Port | Company Product |
| 845 | Direct Piping | Company Product |
| 846 | Direct Pressure Grit Blast Machines | Company Product |
| 847 | Direct Water Level Gauges | Company Product |
| 848 | Direction Finders | Company Product |
| 849 | Directional Control Valves | Company Product |
| 850 | Directional Controls | Company Product |
| 851 | Directional Power Meters | Company Product |
| 852 | Directional Valves | Company Product |
| 853 | Director Chairs | Company Product |
| 854 | Directory & Guide Publishers | Company Product |
| 855 | Directory Advertising | Company Product |
| 856 | Directory Boards & Systems | Company Product |
| 857 | Dirt Filters | Company Product |
| 858 | Dirt Resistance Paints | Company Product |
| 859 | Dirt Separators | Company Product |
| 860 | Disc | Company Product |
| 861 | Disc Aerator | Company Product |
| 862 | Disc Brake | Company Product |
| 863 | Disc Brake Conversion Kits | Company Product |
| 864 | Disc Brake Kit | Company Product |
| 865 | Disc Brake Pads | Company Product |
| 866 | Disc Brake Plates | Company Product |
| 867 | Disc Brakes | Company Product |
| 868 | Disc Clutch | Company Product |
| 869 | Disc Couplings | Company Product |
| 870 | Disc Diffusers | Company Product |