| 1110 | Indian hemp growing | |
| 3511 | Industrial alcohol manufacturing | |
| 3831 | Industrial apparatus, electric, manufacturing | |
| 9350 | Industrial association | |
| 5000 | Industrial building construction | |
| 3824 | Industrial coffee grinder, electric, manufacturing | |
| 8102 | Industrial credit company | |
| 3211 | Industrial fabric, woollen, manufacturing | |
| 8102 | Industrial finance company | |
| 3829 | Industrial furnace manufacturing | |
| 3220 | Industrial garment, except rubber, manufacturing | |
| 3559 | Industrial garment, rubber, manufacturing | |
| 3220 | Industrial garment, rubberized fabric, cutting and sewing | |
| 3620 | Industrial glass product manufacturing | |
| 3852 | Industrial goggle manufacturing | |
| 3233 | Industrial leather belting manufacturing | |
| 3233 | Industrial leather packing manufacturing | |
| 8102 | Industrial loan institution | |
| 3842 | Industrial locomotive and part manufacturing | |
| 3829 | Industrial oven manufacturing | |
| 8310 | Industrial property lessor | |
| 8324 | Industrial research laboratory, not manufacturing | |
| 9310 | Industrial school | |
| 3829 | Industrial stacker manufacturing | |
| 8324 | Industrial technical consultant | |
| 3829 | Industrial tractor manufacturing | |
| 3829 | Industrial trailer manufacturing | |
| 3115 | Inedible tallow manufacturing | |
| 3121 | Infants' food, not with milk base, manufacturing | |
| 3112 | Infants' food, with milk base, manufacturing | |
| 3212 | Infants' napkin cutting and sewing | |
| 3213 | Infants' outerwear knitting | |
| 2909 | Infusorial earth mining or quarrying | |
| 3699 | Infusorial earth, calcining or washing, not at mine | |
| 3720 | Ingot, gold, manufacturing | |
| 3851 | Inhalator manufacturing | |
| 3529 | Ink eradicator manufacturing | |
| 3529 | Ink manufacturing | |
| 3620 | Ink well, glass, manufacturing | |
| 1302 | Inland fishing | |