| Company | Location |
|---|---|
| Research Support Instruments Inc. | Lanham, Maryland, United States |
| Resodyn Acoutic Mixers Inc. | Butte, Montana, United States |
| Resodyn Corp. | Butte, Montana, United States |
| Resonetics Inc. | Nashua, New Hampshire, United States |
| Retsch, Inc. | Newtown, Pennsylvania, United States |
| Revertex (Malaysia) Sdn Bhd | Kluang, Johor, Malaysia |
| Reynard Corp. | San Clemente, California, United States |
| RF Micro Devices Inc. | Greensboro, North Carolina, United States |
| Rhiner & Assoc. | Cupertino, California, United States |
| RHK Technology Inc. | Troy, Michigan, United States |
