| SIC Code | Business or Product | Registrants |
|---|
|  | | |
| 5043 | Identity recorders for photographing checks and fingerprints – wholesale | * |
| 2899 | Igniter grains, boron potassium nitrate | * |
| 3694 | Ignition cable sets or wire assemblies for internal combustion engines | * |
| 3822 | Ignition controls for gas appliances and furnaces, automatic | 35 |
| 3694 | Ignition systems, high frequency | * |
| 3825 | Ignition testing instruments | 93 |
| 3612 | Ignition transformers | 23 |
| 3229 | Illuminating glass: light shades, reflectors, lamp chimneys, and globes | * |
| 1099 | Ilmenite mining | 1 |
| 3299 | Images, small: gypsum, clay, or papier-mache-factory production only | * |
| 9721 | Immigration services – government | 5 |
| 9431 | Immunization program administration – government | – |
| 3679 | Impedance conversion units, high frequency | 159 |
| 3825 | Impedance measuring equipment | 93 |
| 3824 | Impeller and counter driven flow meters | 11 |
| 3842 | Implants, surgical | 187 |
| 1389 | Impounding and storing salt water in connection with petroleum production | 171 |
| 4971 | Impounding reservoirs, irrigation | * |
| 3843 | Impression material, dental | 40 |
| 2759 | Imprinting, except lithographed or gravure | * |
________
* There are SEC Registrants, but only at the 2- or 3-digit SIC Code levels. |
