| OE2, Inc. ( Brisbane, CA ) | OEM Controls ( Shelton, CT ) | Oerlikon Cantraves Pyrotec AG( Zurich ) |
| OEA, Inc. ( Aurora, CO ) | OEM Electronics Limited( New Territories ) | Oerlikon Conatraves AG( Zurich ) |
| Oea, Inc. ( Denver, CO ) | OEM Incorporated ( Hollywood, CA ) | Oerlikon Contraves AG |
| OEC MEDICAL SYSTEMS, INC. | OEM Products, LC ( Gardnerville, NV ) | Oerlikon Contraves AG ( Zuerich, CH ) |
| OEC Medical Systems, Inc. ( Salt Lake City, UT ) | OEM Shades, Inc. ( Ford City, PA ) | Oerlikon Contraves AG( Zurich ) |
| Oece Industrie Chimiche SpA ( Cavezzo, IT ) | OEM Systems Company, Inc. ( Saarks, NV ) | Oerlikon Contraves AG ( Zurich, CH ) |
| OECHSLER ADTIENGESELLSCHAFT ( Koblenz, DE ) | OEM Systems Company, Inc. ( Sparks, NV ) | Oerlikon Contraves Pyrotec AG |
| Oechsler AG( Ansbach ) | OEM, Shades, Inc. ( Ford City, PA ) | Oerlikon Contraves Pyrotec AG( Zurich ) |
| Oechsler Aktiengesellschaft( Ansbach ) | Oen Norske Stats Oljeselskap A.S.( Stavanger ) | Oerlikon Contraves Pyrotec AG ( Zurich, CH ) |
| OECHSLER AKTIENGESELLSCHAFT ( Ansbach, DE ) | Oenophilia, Inc. ( Hillborough, NC ) | Oerlikon Geartec AG( Zurich ) |
| OECO Corporation ( Milwaukie, OR ) | Oenophilia, Inc. ( Hillsborough, NC ) | Oerlikon Geartec AG ( Zurich, CH ) |
| OED Environmental Systems, Inc. ( Ann Arbor, MI ) | OEP, Inc. ( West Palm Beach, FL ) | Oerlikon GMBH ( Paris, FR ) |
| OED Occtech Limited( Subiaco East ) | OEPic Semiconductors, Inc. ( Sunnyvale, CA ) | Oerlikon Heberlein Temco Wattwil( Wattwil ) |
| OED Technologies | OEpic, Inc. ( Sunnyvale, CA ) | Oerlikon Heberlein Temco Wattwil ( Wattwil, CH ) |
| OEKAG WasserTechnik (Schweiz) AG ( Luzern, CH ) | Oerlikon Assembly Equipment AG, Steinhausen( Cham ) | Oerlikon Heberlein Temco Wattwil AG( Wattwil ) |
| Oelikon Trading AG Truebbach ( Treubbach, CH ) | Oerlikon Assembly Equipment AG, Steinhausen ( Cham, CH ) | Oerlikon Leybold Vacuum GmbH( Cologne ) |
| OEM Components, Inc. ( Houston, TX ) | Oerlikon Assembly Equipment Ltd. Steinhausen ( Cham, CH ) | |
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