| OC Applications Research LLC ( Wilmington, DE ) | Ocaneering | OCCAM PORTFOLIO LLC ( Cupertino, CA ) |
| OC Concepts, Inc. ( Costa Mesa, CA ) | Ocarina Network Inc. | Occam Research Corporation ( Waltham, MA ) |
| OC Oerlikon AG( Balzers ) | OCARINA NETWORKS ( San Jose, CA ) | Occam Research Corporation ( Watertown, MA ) |
| OC Oerlikon AG ( Balzers, LI ) | Ocarina Networks Inc. | Occhi Sani, LLC ( Abilene, TX ) |
| OC Oerlikon Balzers AG | OCAS AS( Oslo ) | Occicdental Chemical Corporation ( Dallas, TX ) |
| OC Oerlikon Balzers AG( Balzers ) | OCAS Corp. | Occidental Chemical Corporation |
| OC OERLIKON BALZERS AG ( Balzers, CH ) | Ocas Corp. ( Ansan, KR ) | Occidental Chemical Corporation ( Dallas, TX ) |
| OC Oerlikon Balzers AG ( Balzers, LI ) | OCC Corporation( Kanagawa ) | Occidental Chemical Corporation ( Grand Island, NY ) |
| OC Oerlikon Balzers AG( Furstentum ) | OCC Corporation ( Kanagawa, JP ) | Occidental Chemical Corporation ( Niagara Fails, NY ) |
| Oc Oerlikon Balzers AG ( Furstentum, LI ) | OCC Corporation( Tokyo ) | Occidental Chemical Corporation ( Niagara Falls, NY ) |
| OC OERLIKON BALZERS AG ( Ulm, DE ) | OCC Corporation( Yokohama ) | Occidental Manufacturing, Inc. ( Graton, CA ) |
| OC OERLIKON BALZERS AG. ( Balzers, LI ) | OCC Research Center Inc. ( Tokyo, JP ) | Occidental Oil Shale, Inc. ( Grand Junction, CO ) |
| OC Oerlikon Balzers Ltd.( Fuerstentum ) | OCC ST Co., Ltd. ( Gyeonggi-do, KR ) | Occidental Permian Ltd. ( Houston, TX ) |
| OC Oerlikon Blazers Ag( Balzers ) | Occam Marine Technologies, Ltd. ( Halifax, CA ) | Occidental Petroleum ( Pittsburgh, PA ) |
| OC Oerlikon Blazers Ag ( Balzers, LI ) | Occam Networks ( Goleta, CA ) | Occidental Petroleum Corporation ( Los Angeles, CA ) |
| OC Systems Incorporated ( Fairfax, VA ) | Occam Networks ( Santa Barbara, CA ) | Occidental Research Corporation ( Irvine, CA ) |
| OCA Applied Optics, Inc. ( Garden Grove, CA ) | Occam Networks, Inc. ( Santa Barbara, CA ) | |
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