| Hascall-Denke (Palmetto, FL)
|
| Hawk Instruments (Canyon Country, CA)
|
| Haymes Scientific Inc (Austin, TX)
|
| Heat Equip & Technology (Johnstown, OH)
|
| Heathrow Scientific (Vernon Hills, IL)
|
| Heatronics Infra-Red Inc (Ankeny, IA)
|
| Helm Instrument Co Inc (Maumee, OH)
|
| Henry Dietz Co Inc (Astoria, NY)
|
| Hepfer Machine (Bellefonte, PA)
|
| Heraeus Electro-Nite Co (Peru, IN)
|
| Herman H Sticht Co (Brooklyn, NY)
|
| Herrmann Associates Inc (Pittsburgh, PA)
|
| Hew Communications Inc (Keene, NH)
|
| Hickok Inc (Cleveland, OH)
|
| Hid Corp (Denver, CO)
|
| Higgins Analytical Inc (Mountain View, CA)
|
| High Precision Devices Inc (Boulder, CO)
|
| High Precision Graphics (Springboro, OH)
|
| High Pressure Diamond Optics (Tucson, AZ)
|
| High Tech Inc (Gulfport, MS)
|
| Hillcrest Radiant Heating Co (Cleveland, OH)
|
| Hitec Products Inc (Ayer, MA)
|
| Hi-Tech Ignition Interlock (Las Vegas, NM)
|
| Hmc Int'L Div Inc (Littleton, CO)
|
| Hoekstra Building Automation (Homewood, IL)
|
