| SIC Code | Business or Product | Registrants |
|---|
|  | | |
| 3827 | Interferometers | 53 |
| 7389 | Interior decorating consulting service, except painters and paperhangers | 2,045 |
| 7389 | Interior designing service, except painters and paperhangers | 2,045 |
| 2211 | Interlining material, cotton | 34 |
| 8052 | Intermediate care facilities | * |
| 6159 | Intermediate investment `banks’ | 120 |
| 3462 | Internal combustion engine (stationary and mobile) forgings, ferrous: not made in rolling mills | * |
| 3825 | Internal combustion engine analyzers, to test electrical characteristics | 93 |
| 3519 | Internal combustion engines, except aircraft and nondiesel automotive | * |
| 4131 | Interstate bus lines | * |
| 3555 | Intertype machines | 22 |
| 4131 | Interurban bus lines | * |
| 3743 | Interurban cars and car equipment | 34 |
| 4011 | Interurban railways | 66 |
| 3851 | Intra ocular lenses | 48 |
| 4449 | Intracoastal freight transportation | * |
| 3842 | Intrauterine devices | 187 |
| 2834 | Intravenous solutions | 1,955 |
| 7352 | Invalid supplies rental and leasing | * |
| 8999 | Inventors | 1 |
________
* There are SEC Registrants, but only at the 2- or 3-digit SIC Code levels. |
